"There is no such thing as a communal Tarantula" (Stanley Schultz), "except Monocentropus balfouri" (Scarab).
H incei seems to be the common choice, but I know for a fact they only tolerate each other until they get hungry. My wife had an H incei "communal" and ended up with one. She fed them once a week. She also had an H gigas "communal" and ended up with a few fat slings.
As for any other species, I am to be convinced. It seems that food deprivation will turn any spider into a cannibal, except for M balfouri. I have NEVER seen slings or adults turning on each other, even under the harshest conditions. Now I am not about to starve my spiders to test this theory, but what happens and is still happening in my communal speaks volumes.
Most people are like clouds. The sun comes out when they f*ck off...