Many middleweight champs in days before 154 division came along fought at around 154. Since 1970's, Hearns and Leonard.
Definite Hearns Leonard Griffith LMR McCallum Gavilan Robinson Duran Benitez Prime Whitaker Probable Mayweather Curry Jackson Billy Graham Napoles Dupas Carter Wright Burley I say probably because there is certainly a situation where I could see Tito knocking off some of those guys, I mean the Jackson fight anything could happen there..Curry's durability issues could come into play...Napoles skin could etc etc. 50-50 Starling Forrest Cokes Norris (literally if they fought 10 times I could see them splitting it 5 a piece) Quartey (I always pick Tito in this one but I can see why people would pick Ike) Mosley Moyer Palomino Brown A lot of the last list I would probably side with Tito if pushed but he is no means a lock for all of them. I might be overlooking quite a few for at least the 50-50 aswell but no point going on with that, it's not really what you asked for. Welterweight especially has a crazy rich history.