Excuse the noob post.
Out of all of my Elphelt fights the most interesting have been Axl, Zato, and Sin. Players use them very offensively (Axl feels closer to neutral game imo) but can get wrecked with a few reads. But the same goes vice versa. I don't know if it's like that for all El players though.
I haven't met a Leo with a stable game yet. They conquer the line of defense or they get shot in the face point blank. I remember hearing something about him having no/horrible dash game so they make a point of getting close really quickly(?)