Are you going to bucket stock your pond, or have you checked what is available from your local fish suppliers?
There have been several discussions on Pond Boss about orangespotted and longear sunfish, as well as warmouth. However, those fish tend to be very difficult to source.
Also, are you going to have a large predator in the pond? A sunfish species and minnow pond will eventually end up with thousands of stunted sunfish, since even the species less prolific than BG still produce a lot of babies!
As Bill says, every species is protective when you go through their nests. I used to swim and lifeguard at a Boy Scout facility on a large reservoir that had multiple fish species. We had a designated swimming area with lots of swimmers, so presumably the area was "nest free". The only time I ever got nipped (and actually observed the culprit) it was a BG, or possibly a BG/green sunfish hybrid. I think that male nipples might look like a bit of worm to a hungry BG, because that was by far the most common "nip complaint" from the kids that were poor swimmers and typically just stood on the bottom in the neck-deep water!
