Hi there.
Nice list!
Here is my favorite to least favorite rankings:
Shaw [name_m]David[/name_m]-That’s beautiful. It’s so gentle & warm, yet still clearly masculine. [name_u]Shaw[/name_u] is really simple but completely underused.
Asher [name_u]Gene[/name_u]-I’m not into [name_u]Gene[/name_u], but maybe it’s an honor name? This combo flow fine. I like [name_u]Asher[/name_u]. It’s a great balance of rugged & manly but still has a soft slightly mysterious vibe. Especially w/the nn [name_u]Ash[/name_u].
Leo [name_m]Anthony[/name_m]-I don’t care much for [name_m]Anthony[/name_m] either, but this is a cute combo. [name_m]Leo[/name_m] is just simple, quirky & charming. It’s getting pretty popular if that bothers you.
Knox [name_m]David[/name_m]-[name_m]Knox[/name_m] is fun. I love this combo. [name_m]Knox[/name_m] is kind of posh & dashing. Fairly uncommon as well.
Auden [name_u]Gene[/name_u]-This is fine. It doesn’t blow me away, but still kind of a cool name.
Hope this helps. 
Knox [name_m]David[/name_m] and [name_m]Leo[/name_m] [name_m]Anthony[/name_m] are my favorites 
Knox is such an upbeat name and [name_m]David[/name_m] sounds sweet with it. [name_m]Leo[/name_m] [name_m]Anthony[/name_m] has a good flow to it and [name_m]Leo[/name_m] is such a lovely name!
I love [name_u]Auden[/name_u] [name_u]Gene[/name_u] and [name_m]Knox[/name_m] [name_m]David[/name_m]!!