You can find photos of all three in the Kurins and O'Brien book, "Boss of Bosses."
Most scholars would say that John Gotti is historically important because he represented the last gasp of of the myth that the Mafia was "invincible"--namely that he was able to beat three extremely high-profile felony raps, including a RICO rap. That's how he got his nickname, "the Teflon Don." He was also a folk hero to some people, a Mob boss from a supposedly "secret" society who lived his life like a celebrity. I think he was historically important because he personified the decline of the Mafia in modern times: the Dunce as Don.