7. Bret Hart
Sting and Bret “The Hitman” Hart feuded in 1998 and 1999, when both worked for WCW World Championship Wrestling.
While they also wrestled each other on Monday Nitro, their 2 most memorable matches happened on PPV, at WCW Halloween Havoc 1998 and WCW Mayhem 1999.
6. Sid Vicious
Sting and Sid Vicious feuded in 1990, 1993 and 1999, when both worked for WCW World Championship Wrestling.
Who could forget the WCW Halloween Havoc 1990 Main Event, where Sid brought in Barry Windham as imposter Sting, but still failed to win the NWA World Heavyweight Championship.