Any of them, I've been using everything from teensy,nano, and rebranded Uno. So far they have all worked like a charm and at a steep price reduction. Example, 5 nanos for $15 from Amazon [1].
Yeah, I've not really had a problem with off-label Arduino chips/boards whenever I've ordered them either, except for one being DOA and another having an I/O pin that just wasn't connected somewhere along the way inside the microcontroller.
[1] - https://www.amazon.com/XCSOURCE-ATmega328P-Controller-Arduin...