More than 1 Basslet in a 220?

Hi all,
Ive read a variety of reviews. Anyone with experience with multiple basslets? I have a 220G that I am slowly stocking. I like the royal gramma and the chalk basslet. Can they go together in my tank or would it be better to just pick 1?
theres just 5 chromis and 2 clowns and a cardinal in it now. Thanks!