Well one that springs to mind is 'just down the road' from Budapest in Timisoara!
I think that is pushing the definition of a hub, but it does serve quite a few niche routes, and I even managed to get ARW-VCE for a mere £144! IIRC, haven't Carpatair served LTN too?
TSR may only handle c. 1m pax pa, but I'd say it kicks above its weight considering the city itself is only 300k. I'd love to know its split between o&d and transfer.
I bet the PSC at BUD is still quite a bit higher though. Your other problem would be that a lot of the 'goodwill' for Malev is already sitting in SNN. The locos have cherrypicked the good routes. So you would be left with serving niche destinations, feeding other people's hubs that FR & W6 don't want to go near (CPH, ZRH etc) and then going head to head on routes with enough room for 2 or more carriers.
It is still very tall order.