I would say MEGANSLIFE was the first one I literally encountered on
YOUTUBE.com and her transition video left my jaw at the floor.
It was one of those "Oh, it can be done" things.
She also presents herself in such a caring and informative way.
When I struggle through things in my transition, I'll go to some of her videos for advice.
I've also liked Trupoet (Jerica) for being so honest about her life. I think I shed a tear or two with her and appreciated her sincerity.
Then I would say Minorqback , since she seems to be very comfortable with "tomboy" herself and gives another example of just being yourself.
Those are the ones that really stand out to me at this moment.