Which real life pro boxer from the Rocky movies had the most accomplished career?

just for a bit of fun. All the real life pro boxers that have appeared as characters in the 6 Rocky movies plus the more recent spinoff, Creed. But you can't include Joe Frazier, Roberto Duran and Mike Tyson who had small cameos. To make it a bit more interesting, these are the names of the characters that those real life boxers played in the movies.

Ricky Conlan
Danny Wheeler
Leo Sporino
Tommy Gunn
Union Cane
Mason Dixon.

So the boxers that played those characters, who would you say had the most successful and accomplished careers in real life?