A great one is Petrosedum 'Gold Select'. It stays more compact than 'Angelina', the leaves are also more robust/thicker as are the stems. The color is better also.
This is not the same plant as 'Angelina', this one rarely blooms.
Teresa what type of sedum are you looking for? Ground cover types, or the tall types? There are many that will grow in your zone 6.
How about this beauty. It is hardy to zone 4a
This new genera cross is awesome
Zone 4 on this one
Here is a mix of different types of sedum
