Ali, of course, though he moved in and out enough to make his fights interesting. Leonard falls in this category. Haven't seen Pastrano, Del Flanagan, Ralph Dupas, or Joey Maxim mentioned. Though Maxim was more of a flick, grab and hold kind of a guy. Loughran could be considered a runner, although like Pep he did it with a certain amount of finesse. Bernie Docusen too. They were more stick and movers, in and out. Less out and out running than the others I have mentioned. These are very casual thoughts.
I find no one even close to Edwin Viruet Edit: against Duran he is literally running and jogging in circles for half of the fight lol
1st a runner to me personally is a fighter who was completely unwilling to take risk. Someone like Howard Davis Jr or Hector Camacho Sr after Rosario who used movement with the philosophy of taking no chances of getting hit cleanly. Thus, they were not in position to slip and counter with maximum effectiveness,allowing their opponent that split second to see what was coming from them and minimize the effectiveness of their offense. To include Ali and especially Leonard in that category is short sighted. Most of his career, Leonard was usually flat footed slipping and countering HARD! In fact in a few fights, especially the fight with Kalule , he stayed flat footed to long,and took unnecessary punishment to stop Kalule when he could've easily have outmaneuvered "run" and win a wide dec. But without that mentality he doesn't defeat Hearns in the very next fight. The only fights Leonard used a ton of movement was the 2nd Duran fight and the last few rds against Hagler. To include Ali, Leonard,Whitaker, Pepp, pre Rosario Camacho into category of "runner" is wrong and short sighted in my opinion.