Thank you everyone. I want to add that we would like suggestions of any names for the middle; it doesn't have to be a name from the first post.
As for the suggested combos, we both like:
I think I would like some longer mn suggestions to go with Leo though. I feel bad, but I'm just not as in love with any of these names as I am with our girl names.
On first read I missed that Stellan and Grey were from the middle names list, I was gonna say Stellan Grey, but I wanna second Jasper Grey. Sorry you don't love your boy names as much as your girl names =( I have the exact opposite problem -- a few boy names that I absolutely adore, tons of girl names that I can't quite fall in love with. Best of luck!