I think someone who's "been there, done that" as a front line SG in the NBA would an ideal mentor for DeRozan. He only spent one season at USC, and hasn't had the chance to take on the demands of a leadership role. A mentor could help speed up the maturation process, and perhaps allow him to take on a share of the leadership mantle in a few years.
Bosh had mentors like Sam Mitchell, Michael Curry, and I forgot the other one he mentioned. However, most of their guidance likely fell under "how to be a pro", rather then tricks of the bigman trade.
It would be ideal if DeRozan could gain a teammate who could teach him both. Someone who was once a good starting NBA SG, but is now just happy to get a contract and a chance to contribute. An example from the past is Ron Harper. From wiki article Ron Harper:
Harper starred at Miami University in Ohio, where his high flying playing style drew rousing comparisons to Julius Erving. Harper averaged 24.3 points per game, 11.2 rebounds per game, 3.2 steals per game, and 2.4 blocked shots per game.
...After Harper's collegiate basketball career he was selected 8th overall by the Cleveland Cavaliers in the 1986 NBA Draft. He averaged 22.9 points per game in his rookie season, placing second in Rookie of the Year balloting.
...While with the Clippers Harper sustained a knee injury which robbed him of much of his speed and jumping ability
...After his first tumultuous season in Chicago, he reinvented himself as a defender and jump shooter. With the return of Jordan in late 1995, Harper remained a key component of the Bulls' perimeter defense and a third scoring option on offense.
...He was a mainstay of five of Phil Jackson's ten championship teams, following Jackson to Los Angeles to win two more championships (after winning 3 with the Bulls). Along with Harper, Dennis Rodman and Robert Horry are the only players to win consecutive NBA Championships with each of two different teams.
This is the kind of player, and career arc, that would serve as a good example to DeRozan. Someone who came in as a premier scorer, yet already realized the importance of the otherside of the court.
From CNNSI article during his college days:
"Before the season began, he inscribed the word DEFENSE on his left sneaker and DUNK on his right one because, he says, "those are the things I do best." With those prodigious pincers at the ends of 39-inch arms. Harper can strip his man with the ease of a professional pickpocket, then take off for a breakaway dunk. "When you pick a guy, you make him look bad," Harper says. "And when I'm on my way to the hoop, my eyes get real big."
Do you think he would've believed that, sans hops, he would go on to win five championships as a key component along side some the 90's best players?
Who are a few of the vets in the NBA that could fill a mentor type role for DD, and not let their ego get tied up in how many minutes they receive?
(On a somewhat related note, I leave you with this last pic. Perhaps Agent Zero could've learned a thing or two from ol Ron as well ;-)