I've got a full drawer of foundations and the majority of them are drugstore. These are my current favorites from the ones I've tried out.
L'oreal True Match Lumi
Good color selection
Another favorite of mine is Revlon Colorstay. Full coverage, matte finish, long lasting. The only problem I have with colorstay in the color selection. I have yellow undertones and most of their colors are on the pinkish side. Besides that its a great foundation.
Let me know what your favorites are!