I like [name]Max[/name], but it’s a lot more common than what I usually go for. I’m looking for some classy, but no pretentious, middle names! Vintage etc.
All I can think of are…
[name]Reginald[/name]
[name]Theodore[/name]
[name]Ambrose[/name]
[name]Winston[/name]
What about: [name]Sebastian[/name], [name]Atticus[/name], [name]Alaric[/name], [name]Cassidy[/name], [name]Amadeus[/name], [name]Abraham[/name], [name]Alexander[/name], [name]Elias[/name], Elyan, [name]Elijah[/name], [name]Finnegan[/name] / [name]Finnigan[/name], [name]Jeremiah[/name], [name]Zachariah[/name], [name]Tobias[/name], [name]Tennyson[/name], [name]Alberto[/name]? I also noticed that in your signiture you have [name]Sylvester[/name] and [name]Percival[/name], I think they would go nicely with [name]Max[/name] too 
[name]Max[/name] [name]Sullivan[/name], [name]Max[/name] [name]Ambrose[/name] or [name]Max[/name] [name]Solomon[/name].
[name]Max[/name] [name]Donovan[/name]
[name]Max[/name] [name]Peregrine[/name]
[name]Max[/name] McClaren
[name]Max[/name] [name]Finnian[/name]
[name]Max[/name] [name]Finnegan[/name]
[name]Max[/name] [name]Barnaby[/name]
[name]Max[/name] [name]Eleazar[/name]
[name]Max[/name] [name]Amadeo[/name]
[name]Max[/name] [name]Raphael[/name]
[name]Max[/name] [name]Mordechai[/name]
[name]Max[/name] [name]Gabriel[/name]
[name]Max[/name] [name]Everett[/name]
[name]Max[/name] [name]Dorian[/name]
[name]Max[/name] [name]Florian[/name]
[name]Max[/name] [name]Lorenzo[/name]
[name]Max[/name] [name]Adrian[/name]
[name]Max[/name] Kerrington
[name]Max[/name] [name]Alistair[/name]
[name]Max[/name] [name]Augustin[/name]
[name]Max[/name] [name]Walter[/name]