Back to the Future Villains

Biff Tannen's Gang/BiffCo
Biff Tannen (Match, Skinhead & 3-D)

Griff Tannen's Gang
Griff Tannen (Data, Spike & Whitey)

Buford Tannen's Gang
Buford Tannen (Stubble, Ceegar & Buck)

Tannen Crime Family
Kid Tannen | Cliff Tannen | Riff Tannen

Others
The Libyans | Edna Strickland | Megatron (Transformers/Back to the Future) | Tannen Family