I haven't checked what brebas are forming now, but the brebas that have tasted really good for me are:
Vista
Brooklyn White
Lebanese Red
Calabrese Long (long breba)
Dark Portuguese
Naples White
Negretta (main crop is much sweeter)
Negronne
Black Weeping
Desert King (you will only get brebas so don't remove those)
I'll keep you updated once I get brebas this year of other varieties.