Dairanger was probably the best one, even though it had Dragon Ball Z fighting in some episodes, other than that I liked how they used real martial arts styles and how the story was written since Dairanger had little if any filler.
AHHHHH Those are me 3 favs I would have say they are all awesome.
I like these type of sentais because they have awesome fight scenes, weapons that feel more realistic, and a better storyline.