These are some of the guys I look to for training information. Take a few minutes to research them for yourself and draw your own conclusions. If you do get in touch with them, please tell them Dave from FLC Knives sent you.
They are listed in no particular order as there is no best place to start, they all shine in their own specialties. You may currently be at a specific place in your journey but as you progress they will all become relevant.
Listing these resources here does not imply that I have trained with them. It simply means that I have reason to respect them and what they teach. In a discussion about a specific training topic I would recommend one of them specifically based on the need.
Chimera Firearms Training
(check out the articles)
Yoga for BJJ
Guro Joe Apostol
Pekiti Tirsia Tactical Association
True North Tradecraft