These are some of my favorite fighters, some not so much, some I'm just nuetral.
I'm not trying to bash these guys.
Leonard Garcia. Mental focus. Never got any better.
Melvin Guillard. Mental focus. Never got any better.
Jake Sheilds. Striking. Still awkward after all these years. Predictable.
Aoki. Striking. Marginally improved, but still weak-sauce.
Diaz Brothers. Wrestling and kicks.
Dean Lister. Striking. Still awkward and elementary.
BJ Penn. Pure, raw, undisciplined talent. Only got with expected modern strength and conditioning levels for brief glimpses.
Everyone on my list is superb in at least one or more aspects.
For example, I always wonder "why hasn't Jake/Dean/Aoki focused primarily on training his striking?" Like 90% striking until they become "very good pro-mma level" strikers. Maia, Jacare, and Werdum have all shown marked evolution in their striking. Why not Jake/Dean/Aoki?