I've got rabbit snails with MTS and bladder snails, kerri tetras, cardinal tetras, betta, shrimp, sterbai corys... I don't think there's much they wouldn't go with, honestly. As long as it's not some big fish or snail eater.
I really really like my kerri tetras, they're very fun to watch and far more active than most other tetras that I've had (other than rummynose, maybe). But the kerris are aggressive eaters and really fun to watch.
Personally, I'd find like 10-12 tetras you like and some shrimp.