The figure here is an interpretation of Tarzan. I read a few Tarzan novels when I was a kid and enjoyed them but I’ve never been a huge fan. I picked up the entire Tarzan series very cheap when I was at Half Price Books. One of these days I’ll get around to reading them.
The head with the long hair also belongs to Tarzan. Despite his super strength and skills I figure he’s had the chance to pick up a few scars in his life.
The fuzzy shape to the left of Tarzan is probably a shoggoth.
The head at the bottom is the Wizard of Oz. I’m not sure who the other old guy is. Maybe the Wizard if he didn’t have fairy magic keeping him from aging?