Other parrots compatible with lovebirds?

[Echo]

Of course, if you get a bird of a different size, the smaller bird MUST be fully winged so s/he can get away if attacked.

This is VERY IMPORTANT and true!!!

At the same time IF the Lovebird wants to go after it, they will attack them in mid air! That's why my ex roommate hated my little Lovebird that I raised.

Wow, no kidding?
It seems like my species of Lovebird is the sweetest (Black-cheek), but harder to find....