When one asks the "what is most simple fh" question like
@ChaelAZ 's thread, it probably should be followed with two immediate follow-up questions:
1) what type of balls (topspin, pace, etc) do you play against
2) what type of ball do you hit ... flat, flattish, big topspin, heavy?
Maybe a third ... do you have goals to play big topspin, or against big topspin players in the future that you aren't now?
My answers are about most of us ... rec players 3.0 to 5.0. It's been my opinion for a long time that clearly an ATP flip FH is not required to play 5.0 tennis. If you tell me a player needs a better technique than Keys, Stevens, Halep, Garcia
to win at male 5.0 USTA ... it's hard to stop laughing. BUT ... if you are going to be the rec version of 5.0 singles, then the ATP flip FH becomes your logical choice.
I would put it this way. Assuming you answered those follow-up questions as:
1) play 4.5 tennis
2) want to hit decent topspin, but not rec version of Nadal.
I would say longer backswings with a loop would be a good choice. Your Garcia, or maybe a Hewitt seems like a good choice, although maybe question how big/high a loop. (fyi .. if totally flat hitter ... why not Mac?). If wanting to go a "little flippy" I would pick Agassi. Also like Tomic if you want to minimize the timing of a drop.
I think most rec players will end up with a more repeatable stroke (FH and BH) with longer, rather than shorter backswing. My preference is long but still barely on hitting side of body. IMO ... Mischa (sp??) mentioned in other thread would be about the worse model for a rec FH that I could come up with.