What's a good double major for a history and something else degree?

double majors are useless in the real world, unless it's teaching and history and you want to be a history teacher

If you can't think of some other subject you really want to study in depth, then don't double major. There's no point.

I personally like psychology and anthropology but I feel something like classics might be a good supplement because then you could learn about Ancient Greece, Rome etc.