Yes, you have it. It's Mortimer.

I think that he's a very attractive sim, but he probably gets overlooked as such, since he's an old man in the game.

He's actually one of the few Maxis clones that isn't an elder in this 'hood. A number of them are. Their ages are all scrambled in relation to each other too. Mortimer is an adult, and Johnny is an elder, for example.