Agree with ZORBS. You have it backwards. You want to focus on compound movements that are easily loaded (squats, deads, benches, presses, etc). You only have so much gas in the tank, so working these first is the better approach. Isolation movements can be incorporated for two reasons 1) to fix "stuck" compound movements and 2) aesthetics. But always save the isolation moves for last.
So to answer your question, I think you're looking to see what degree a muscle is activated for a movement. Assuming that is the measurement for "best". I've come across various studies in pubmed, but someone I follow has something a bit more comprehensive.
I know these are still "groups" to a certain extent. I'm not sure that someone has focused on the best exercises for the wrist, obliques, etc.