For me, [name]Micah[/name] is a less popular name which is still familiar. For that reason, I would rule out the most popular names from your list - [name]Grace[/name], [name]Eve[/name] ([name]Eva[/name]/[name]Ava[/name]) and [name]Amelia[/name].
For a reason I can’t place, [name]Georgia[/name] and [name]Phoebe[/name] feel a little off to me with [name]Micah[/name] (but I really like [name]Phoebe[/name]).
[name]Norah[/name] would be a perfect match, but for the fact that it ends with the same two letters as [name]Micah[/name]. You could try [name]Eleanor[/name], [name]Honora[/name] or [name]Annora[/name] nn [name]Nora/name, though.
[name]Adeline[/name] is lovely, but I think my favourites would have to be, in order :
[name]Micah[/name] and [name]Lucy[/name]
[name]Micah[/name] and [name]Iris[/name]
[name]Micah[/name] and [name]Stella[/name].
[name]How[/name] about :
[name]Lucy[/name] [name]Adeline[/name]
[name]Iris[/name] [name]Amelia[/name]
[name]Stella[/name] [name]Phoebe[/name].