I think you could have a pair (that's a confirmed pair, not just two fish) in that sized tank, but I'm not sure. You might check over with the folks in New World Cichlids.
Yeah that would be fine as long as they have some space to swim. Even if they aren't a mating pair they'd be fine in a 35. The only time angels become really agressive is when there are two males and one female and they are fighting over her.