I have a Malabar Puffer in my 55 gal. community tank, the only fish she ever bothered was the my betta but that was my fault. Since the betta is red and lazy, he always sits in the plants. I believe she thought his fins were blood worms. My Puffer is in with tiger barbs, swordtails, black neons, gold gourami and baby cory cats. She used to be in a 30 gallon with the neons, she was bored and kept moving up and down the glass, now she swims with everyone very happily.
I also had a red eyed puffer who was also in a community tank, she was very peaceful too...but sadly she passed away from old age.
A side not, Puffers diet should consist of other meaty foods like blood worms, brine shrimp...etc.