I would use [name_m]Colton[/name_m] or [name_u]Jasper[/name_u] with [name_u]Marlow[/name_u]. [name_u]Micah[/name_u] has the right sounds too, but a lot more matchy.
Colton [name_u]Oliver[/name_u] & [name_u]Jasper[/name_u] [name_u]Grey[/name_u] are my favorites from your list. I am biased to [name_u]Oliver[/name_u] because that’s my sons middle name but it’s such a handsome name and sounds so well with [name_m]Colton[/name_m]. Either way I think both [name_m]Colton[/name_m] or [name_u]Jasper[/name_u] compliment [name_u]Marlow[/name_u] very well!
Jasper and Marlow are two of my top names so that gets my vote for sure! If you are the one with Marlow Cole who posted on my question about the name Marlow, I would avoid Colton personally
I personally love alliteration so my heart is with [name_u]Micah[/name_u] ! I think [name_u]Micah[/name_u] and [name_u]Marlow[/name_u] are great together!
Style wise I think [name_u]Jasper[/name_u] is the best “match” however [name_m]Colt[/name_m] feels likes it’s important to you as [name_m]Colton[/name_m] and [name_m]Colt[/name_m] are first and middle name options.
I love [name_m]Colton[/name_m] and [name_m]Colt[/name_m] so my heart is still set on [name_u]Micah[/name_u] so you get to use [name_m]Colt[/name_m] !