I remember buying Hogan/Diesel/Shamrock when I was a kid. I went with Shamrock too, only because I wished Hogan came with better accessories and Diesel's legs were a pain to move.
Barry and Big Daddy Cool were too short, IRS was too thin, Steiner too fat, Hogan could've been taller, so the two best figures to me are 123 Kid and Shamrock, but the lack of a colorful outfit for Kidd gives Shamrock the edge here.