Pretty sure I'll leave some out, but of the first to come to mind are:

1. Arguello - A class act... and I loved his boxing-punching style. "El Flaco Explosivo"!!
2. Sugar Ray Leonard - Still alive, of course... but I'd bring him back from retirement. One of the best there ever was.
3. Hearns - Just 'cause I'd want to see more Leonard-Hearns classics.
4. Trinidad - For obvious (for me) reasons. Loved to fight... one of our local greats. Speaking of which....
5. Wilfredo Gomez - Insane KO percentage... another local great.
6. Marciano - I'd like to finally find out how Rocky would really do against modern-day fighters.
7. Julian Jackson - Scary KO power. Either KO'ed or was KO'ed. You knew some devastation was going to happen.
8. Tyson - With the scarcity of HW excitement going on nowadays... and love him or hate him.... I think we all miss the Tyson days. Besides, I'd like to see him have a go at Wladimir while in their respective primes.
9. Sugar Ray Robinson - Ditto what I said about Marciano.
10. Corrales - Never saw a bad Corrales fight.