I like Oliver! Its super cute! Ollie
Oliver Zachary.
To be honest, in my opinion, i would not use Isaac and a Zachary, as they sound too similar. I would use Zachary for a middle name instead.
Im not too fond of Gabriel.
I am not a fan of Wilder, Will is cute though!

Some more names I like :
Cohen
Riley
Max
Fynn
Flynn
Bailey
Tate
Fletcher
Brodee

Goodluck!!