I actually think Reagan sounds a bit better with Payton than Morgan - neither name is my style, but I would not side eye either of them. If it is the "-an" sound at the end that you worry about being too matchy, what about something completely different, like Sloane, Harper, or Piper?
Re: Reagan
**Post edit for spelling
Avery
Teagan
Tamsin
Reese
Jordan
Skylar
Emerson
Baby #2 Due 3/7/20