Yep, I would really doubt there would be an issue with those two. I would even go so far, as to suggest more angels. Don't forget about the 'medium' angels, those in the Genicanthus, whose behavior is more like a tang's then an angels, and would likely not be an issue as well from either angel. However depending on what other tankmates you have, sometimes mixing Genicanthus with tangs (tangs being the aggressor) can be an issue.