[name_u]August[/name_u] [name_m]Thierry[/name_m] - [name_u]August[/name_u] is great! [name_m]Thierry[/name_m] is alright.
[name_m]David[/name_m] [name_u]Oberon[/name_u] - Can’t go wrong with [name_m]David[/name_m]. Classic. [name_u]Oberon[/name_u] is nice way to add uniqueness. Very cool.
[name_m]Edgar[/name_m] [name_m]Samson[/name_m] - I like [name_m]Edgar[/name_m] + all -[name_m]Ed[/name_m]- names ([name_m]Edvin[/name_m] is one of my faves). [name_m]Edgar[/name_m] is handsome and international. [name_m]Samson[/name_m] is good.
[name_m]Gustav[/name_m] [name_m]Amaury[/name_m] - I like [name_m]Gustav[/name_m]. It’s very masculine and yet refined. Something I’d picture on a royal. [name_m]Amaury[/name_m] is nms, not crazy about it.
[name_m]Griffin[/name_m] [name_u]Storm[/name_u] - [name_m]Griffin[/name_m] is too fairytale imo. And matched with [name_u]Storm[/name_u] it kind of sounds like the main character of a fantasy novel.
[name_m]Maximilian[/name_m] [name_u]Remi[/name_u] - Another strong, regal first name. [name_u]Love[/name_u] it. [name_u]Remi[/name_u] is cute. Not sure how I feel with them together, but they’re nice standing alone.
[name_u]Dylan[/name_u] [name_m]Frederick[/name_m] - [name_u]Dylan[/name_u] is a bit common, but it’s nice. [name_m]Frederick[/name_m] is great! Classic.
I’ll make suggestions:
[name_u]August[/name_u]: Also [name_m]Augustine[/name_m] or [name_m]Augustus[/name_m].
[name_m]Thierry[/name_m]: [name_m]Dietrich[/name_m], [name_m]Theodoric[/name_m], [name_m]Theodore[/name_m] (related names).
[name_u]August[/name_u] [name_m]Theodore[/name_m] is an alternative.
Alternatives to [name_m]Amaury[/name_m]: Amalric (variant), Alberic, [name_m]Aubin[/name_m], [name_u]Emery[/name_u], [name_u]Amery[/name_u], [name_m]Emmerich[/name_m] (variant), Emelrich (variant), [name_m]Emil[/name_m].
[name_m]Gustav[/name_m] Amalric or [name_m]Gustav[/name_m] [name_u]Amery[/name_u].
Alternatives to [name_m]Griffin[/name_m]: [name_m]Gavin[/name_m], [name_m]Graham[/name_m], [name_m]Garrett[/name_m], [name_m]Grafton[/name_m], [name_u]Grey[/name_u].
[name_m]Garrett[/name_m] [name_u]Storm[/name_u] or [name_m]Graham[/name_m] [name_m]Sebastien[/name_m], [name_m]Griffin[/name_m] [name_m]Sebastien[/name_m] (I really love [name_m]Sebastien[/name_m] lol, and it actually goes with [name_m]Griffin[/name_m]).
Alternatives to [name_u]Dylan[/name_u]: [name_u]Dustin[/name_u], [name_m]Dalton[/name_m], [name_m]Dawson[/name_m], [name_u]Dean[/name_u].
[name_u]Dustin[/name_u] [name_m]Frederick[/name_m], [name_m]Dalton[/name_m] [name_m]Frederick[/name_m], or [name_m]Dawson[/name_m] [name_m]Frederick[/name_m].
My favorites of yours are:
[name_u]August[/name_u], [name_m]Edgar[/name_m], [name_m]Gustav[/name_m], and [name_m]Maximilian[/name_m] (though, I tend to like Germanic names so that explains it!)
You have good taste 