Nick Claire is a Dirt biker and so much more.  He has lived a lot in his life so far.  He's humble and highly supportive as an instructor on a dirt bike.  Though its not his main focus, his clinics are fun and very rewarding. Check out all he does on instagram and also his e-bike business.
Instagram: https://www.instagram.com/splat_moto/
Clinics and training: 
https://splatmototraining.com/