Count Nikolas Rokoff

Count Nikolas Rokoff is a greedy former Russian count stripped of his title who hears about a treasure in the valley of the leopards and plans to find it to regain his title. He was voiced by Ron Perlman.

Tarzan and the Lost Treasure
Tarzan refuses to help him until Rokoff threatens to kill Jane if he doesn't. His intellectual battle with Tarzan goes like a chess game until Tarzan finally releases the last few leopards from the boarded up cave on him, but it is unclear if they kill Rokoff or not.