A full config list of all vanilla creatures that are reasonably rideable can be copied from below:

A separated list can be found here

You can also download the full YML file from here and place it in your config folder.

Deer:
  mountPath: CG/Pelvis/Spine/Spine1
  stamina: 80
  saddleTier: 2
  mountPoint: [-0.444998,-0.257368,0.03999349]
  saddlePos: [0.04606726,-0.2971615,0.01007945]
  saddleScale: [1.02,1.155,1]
  saddleRotation: [1.9,0,0]
  flyingStamina: -1
  customSaddle: 
  

Eikthyr:
  mountPath: Armature/Root2/Pelvis/Spine/Spine1
  stamina: 120
  saddleTier: 1
  mountPoint: [-0.00015,0.00415,-0.00356]
  saddlePos: [0,0.000115,-0.00286]
  saddleScale: [0.9,0.8,0.8]
  saddleRotation: [282,270,0]
  flyingStamina: -1
  customSaddle: SaddleT3
  customAttackOrder: 0,2
  

Troll:
  mountPath: Armature/Root/Spine0/Spine1/Spine2/LeftShoulder
  stamina: 120
  saddleTier: 2
  mountPoint: [-0.00285,0.00675,0.00488]
  saddlePos: [0.00125,0.00663,0.00579]
  saddleScale: [1.17,1.55,1.04]
  saddleRotation: [1.6,352,86]
  flyingStamina: -1
  customSaddle: 4
  customAttackOrder: 0,1
  

Leech:
  mountPath: Armature/root/Spine1
  stamina: 120
  saddleTier: 3
  mountPoint: [-0.0006107163,-0.008701043,0.005657894]
  saddlePos: [-0.0002474895,0.001757804,0.006139348]
  saddleScale: [0.85,1.25,1]
  saddleRotation: [87,45,135]
  flyingStamina: -1
  customSaddle: 
  

Blob:
  mountPath: blob/Armature/Bone/Bone.002
  stamina: 120
  saddleTier: 3
  mountPoint: [-0.00021,0.00542,0.00372]
  saddlePos: [-0.000125,0.0036,-0.00319]
  saddleScale: [1.2,1,1]
  saddleRotation: [340,90,180]
  flyingStamina: -1
  customSaddle: 
  

Abomination:
  mountPath: Armature.001/root/hip/spine1
  stamina: 250
  saddleTier: 3
  mountPoint: [-0.00055,0.0135,0.000324]
  saddlePos: [-0.00107,0.0088,0.00233]
  saddleScale: [1,1.4,1]
  saddleRotation: [297,261,106]
  flyingStamina: -1
  customSaddle: 5
  customAttackOrder: 0,2
  

Hatchling:
  mountPath: Hatchling_mountain/Armature/Root/Spine1
  stamina: 120
  saddleTier: 4
  mountPoint: [0,0.00902,-0.00128]
  saddlePos: [0,0.0044,0.0014]
  saddleScale: [0.8,1.3,1]
  saddleRotation: [296,276,175]
  flyingStamina: 1
  customSaddle: 
  

Ulv:
  mountPath: Ulv/Armature/Root/Hips/Spine/Spine1/Spine2
  stamina: 150
  saddleTier: 7
  mountPoint: [-0.00094,0.00415,-0.0013]
  saddlePos: [-0.000314,-0.00137,-0.00392]
  saddleScale: [1.2,1.5,1.2]
  saddleRotation: [286.7,90,-180]
  flyingStamina: -1
  customSaddle: SaddleT4
  customAttackOrder: 0,1
  

StoneGolem:
  mountPath: Armature/Root/Hip/Spine0/Spine1/Spine2
  stamina: 200
  saddleTier: 4
  mountPoint: [-0.00455,0.0138,0.0025]
  saddlePos: [-0.00535,0.0142,-0.00336]
  saddleScale: [1.2,1.4,1.1]
  saddleRotation: [0,102,-180]
  flyingStamina: -1
  customSaddle: 
  customAttackOrder: 1,2
  

Dragon:
  mountPath: Armature/Root/Hips/Spine/Spine1
  stamina: 300
  saddleTier: 4
  mountPoint: [-0.00025,0.00958,-0.00425]
  saddlePos: [0,0.00685,-0.00445]
  saddleScale: [1.955,1.925,1.65]
  saddleRotation: [272,90,180]
  flyingStamina: 0.6
  customSaddle: 6
  customAttackOrder: 2,5,4,4
  

Serpent:
  mountPath: Armature/Root/Main/Tail2
  stamina: 200
  saddleTier: 2
  mountPoint: [0.0003,0.0341,0.00894]
  saddlePos: [0,0.029,0.00904]
  saddleScale: [1,1,1]
  saddleRotation: [272,90,0]
  flyingStamina: -1
  customSaddle: 5
  customAttackOrder: 0,1
  

GoblinBrute:
  mountPath: Armature/Root/Hip2/Hip/Spine1/Spine2/Spine3
  stamina: 250
  saddleTier: 5
  mountPoint: [0.000468,0.0139,0.00363]
  saddlePos: [-0.00015,0.00724,0.00727]
  saddleScale: [1.5,1.4,1.5]
  saddleRotation: [296,270,180]
  flyingStamina: -1
  customSaddle: 
  customAttackOrder: 0,1

BlobTar:
  mountPath: blob/Armature/Bone/Bone.002
  stamina: 200
  saddleTier: 5
  mountPoint: [-0.00021,0.00542,0.00372]
  saddlePos: [-0.000125,0.0036,-0.00319]
  saddleScale: [1.2,1,1]
  saddleRotation: [340,90,180]
  flyingStamina: -1
  customSaddle: 

GoblinKing:
  mountPath: Armature/Root/Root2/Hip/Spine1/Spine2/Spine3/Neck/Bone.007
  stamina: 500
  saddleTier: 5
  mountPoint: [-0.00035,0.0254,0.0064]
  saddlePos: [0,0.0233,-0.0012]
  saddleScale: [1.5,1.5,1.5]
  saddleRotation: [343,90,-180]
  flyingStamina: -1
  customSaddle: 7
  customAttackOrder: 2,1
  

Seeker:
  mountPath: Armature/root/hip/abdomen
  stamina: 300
  saddleTier: 6
  mountPoint: [-0.00028,0.0096,-0.00368]
  saddlePos: [0,0.001,-0.0051]
  saddleScale: [1.7,1.6,1.5]
  saddleRotation: [276,90,180]
  flyingStamina: 3
  customSaddle: 
  customAttackOrder: 2,5,6,6
  

SeekerBrute:
  mountPath: Armature/root/root2/hip/spine
  stamina: 400
  saddleTier: 6
  mountPoint: [-0.000676,0.0109,-0.00403]
  saddlePos: [-0.000257,0.0055,-0.00335]
  saddleScale: [1,1,1]
  saddleRotation: [281,270,0]
  flyingStamina: -1
  customSaddle: 
  customAttackOrder: 2,3


Volture:
  mountPath: Volture/Armature/Root/Hip/spine1/spine2
  stamina: 240
  saddleTier: 5
  mountPoint: [0,0.00224,0.00132]
  saddlePos: [0,-0.000624,0.00136]
  saddleScale: [0.7,0.8,0.6]
  saddleRotation: [273,75,12.5]
  flyingStamina: 0.5
  customSaddle: 7
  

BlobLava:
  mountPath: blob/Armature/Bone/Bone.002
  stamina: 170
  saddleTier: 7
  mountPoint: [-0.000952,0.0114,-0.000695]
  saddlePos: [0.000577,0.00867,-0.00666]
  saddleScale: [1.5,1.7,1.5]
  saddleRotation: [330,78,186]
  flyingStamina: -1
  customSaddle: 
  

BonemawSerpent:
  mountPath: Armature/Root/Main/Tail2/Tail1/Head
  stamina: 300
  saddleTier: 7
  mountPoint: [0.00078,0.00923,0.00900]
  saddlePos: [0.000643,0.00295,0.00849]
  saddleScale: [1.6,1.4,1.4]
  saddleRotation: [280,90,0]
  flyingStamina: -1
  customSaddle: 
  customAttackOrder: 2,0
  

Morgen:
  mountPath: Armature/Root/Hip/Spine/Chest
  stamina: 200
  saddleTier: 7
  mountPoint: [0,0.00444,-0.00336]
  saddlePos: [0,0.00153,-0.00348]
  saddleScale: [0.9,0.8,0.7]
  saddleRotation: [273,90,-180]
  flyingStamina: -1
  customSaddle: 
  customAttackOrder: 4,2
  

Morgen_NonSleeping:
  mountPath: Armature/Root/Hip/Spine/Chest
  stamina: 200
  saddleTier: 7
  mountPoint: [0,0.00444,-0.00336]
  saddlePos: [0,0.00153,-0.00348]
  saddleScale: [0.9,0.8,0.7]
  saddleRotation: [273,90,-180]
  flyingStamina: -1
  customSaddle: 
  customAttackOrder: 3,1
  

FallenValkyrie:
  mountPath: FallenValkyrie/Armature/root/hip/spine0/spine1
  stamina: 300
  saddleTier: 7
  mountPoint: [0.000445,0.00113,0.00259]
  saddlePos: [0.000272,-0.00271,0.00471]
  saddleScale: [1,1.3,1.4]
  saddleRotation: [299,270,-180]
  flyingStamina: 0.1
  customSaddle: 
  customAttackOrder: 1,2,1,2
  

Fader:
  mountPath: metarig/Root/CoG/hip/spine_1/spine_2/chest
  stamina: 350
  saddleTier: 7
  mountPoint: [0,0.0208,-0.00906]
  saddlePos: [0,0.014,-0.00908]
  saddleScale: [1.7,2,1.7]
  saddleRotation: [273,270,0]
  flyingStamina: -1
  customSaddle: 
  customAttackOrder: 4,5