You have three very solid and charming choices!
[name_f][/name_f][name_m]Benjamin[/name_m] [name_m]Robin[/name_m] [name_m]Hamilton[/name_m] → versatile, classic and timeless with a playful air added by [name_m]Robin[/name_m]
[name_f][/name_f][name_m]Thomas[/name_m] [name_m]Mack[/name_m] [name_m]Hamilton[/name_m] → classic and strong but gentle too
[name_f][/name_f][name_m]Mack[/name_m] [name_m]Steven[/name_m] [name_m]Hamilton[/name_m] → charming and cool with plenty of spirit
[name_f][/name_f][name_m]Mack[/name_m] is my favourite option for you, followed by [name_m]Benjamin[/name_m].
[name_f][/name_f]I like [name_m]Mack[/name_m] [name_m]Steven[/name_m], though I would love the combos [name_m]Mack[/name_m] [name_m]Benjamin[/name_m], [name_m]Mack[/name_m] [name_m]Robin[/name_m] or [name_m]Mack[/name_m] [name_m]Thomas[/name_m] even more 
A few alternatives that came to mind:
[name_f][/name_f][name_m]Robin[/name_m] [name_m]Nathaniel[/name_m]
[name_f][/name_f][name_m]Nathaniel[/name_m] [name_m]Robin[/name_m]
[name_f][/name_f][name_m]Isaac[/name_m] [name_m]Benjamin[/name_m]
[name_f][/name_f][name_m]Jasper[/name_m] [name_m]Thomas[/name_m]
[name_f][/name_f][name_m]Oscar[/name_m] [name_m]Mack[/name_m]
[name_f][/name_f][name_m]Jude[/name_m] [name_m]Robin[/name_m]