One Wario-like Pokemon that came to my mind was Diggersby, seeing as it's stated to be as strong as a excavator and has a similar-ish build. Skuntank is kind of perfect though, it even shares the color of his overalls.
It's interesting because I genuinely think, if it ever came down to it, if Wario had to choose between money and his friends, I think he'd VERY reluctantly choose his friends. We don't really see him in those kind of moral situations though, and...
Now, I never said Wario wasn't an asshole. He definitely is one with the way he operates, I just don't think he's a heartless bastard. Being an asshole and heartless aren't synonymous.
Either way, I think we have vastly differing views of Wario...