Rita, I just wouldn't have thought about all those plants as companion plants for sedum. Where have I been all this time? Of course all I had up until several years ago were the low growing ones. Clint has the Echinacea Cubit, plants them with his echies and other things. I never thought of using the echs either until he showed me a picture with the combo. It was stunning. Here's a link to his Cubit.
http://cubits.org/echinaceas I think you'll like seeing what he has over there. : )
Added bonus, he's very nice. : )