Leader-1 is the name of several fictional characters from the Go-Bots, Robo Machines and Transformers toy lines in 1983. The original Leader-1 was voiced by Lou Richards in the animated Challenge of the Gobots series. Since then Hasbro acquired legal rights to the name and has used it for a Mini-Con.
Read more about Leader-1: Gobots, Transformers: Armada, Transformers: Timelines