I think skyla McKenzie is so cute!!
I like Skyla Mckenzie the best too!
Skyla Rose was my first thought but Skyla Mckenzie is my favorite out of the family names you listed
I think I'm liking Skyla Allie now!
Skyla Marie is the first one that popped in my head! :)
I would suggest something one syllable to go with it. Such as Skyla Rose or Ann would flow better than Skyla McKenzie. Tho it also depends on the last name to get the proper flow.