Eclectus, CAG, BH Pionus, Maximilian’s Pionus, Quakers, Indian Ringnecks, Green Cheeked Conures, Black Capped Conures, Cockatiels, Lovebirds, Budgies, Canaries, Diamond Doves, Zebra Finches, Society F
Depends on how you socialize them, introduce them, train them, and their own individual personalities. Some species are LESS likely to get along, such as sennies, but NO parrot is guaranteed to get along so never get a second parrot unless you are willing and able to keep them 100% separated for the next 30 years.