I have tried rajapuri last winter but i wasn't impressed... maybe my winter is colder than expected, i don't know.
My climate is pretty similiar, according my researchs, to the climate of virginia beach, in Viriginia. The main difference compared to virginia beach, are the absolute minimum temperatures, i'm a bit milder, on average, than that, (so far i got 23F on night, and this may have been indeed the colder night of this winter) but our hot season is pretty much as lenghty.
So far i have identified those cultivar that look promising:
Helen's hybrid,
chini champa,
malbhog,
cardaba,
pahari kela.
An honorable mention should go to musa saba, because i have heard that resiststo very cold temperatures, but ti becomes so big that is almost unmanageable.
I don't know if anyone has experience with any of those. Everyone but one are readily aviable on european market, but i guess that out there there must be some more cultivars worth of attention.