No I wouldn't class the artists as choral artists at all, I'm just pointing out that there are examples of polyphonic singing with multiple voices in pop music, it's just that it's usually accompanied with a rhythm section. Pieces that feature choral singing can be very accessible, although acapella music usually isn't. But take the example of Pentatonix someone mentioned earlier (which isn't really choral singing either because of the lack of voice doubling). What makes them accessible is that they use beat-boxing to provide the rhythm line for the punters.