For me, I would've gone with...
Castlevania: Grimoire of Souls*
SP!NG*
Rayman Mini*
Frogger & the Rumbling Ruins*
Exit The Gungeon^
Lumens+
Spire Blast
Monument Valley 1+ & 2+ (these are short enough that I feel we could combine them into 1)
Samurai Jack: Battle Through Time^
TMNT Splintered Fate^
What the Golf^
Cut The Rope 3
Bloons TD 6+
Dead Cells+
Badland+
... These should keep you occupied for a few months.
However, worth noting is that while the ones marked with a '*' (AFAIK) can only be played on AA, many others are also on other platforms and/or regular iOS.
For one, anything with a '+' suffix is used to mark it as the AA veresion of the game, vs. non-AA on iOS.
Off the top of my head, I know for sure that ones marked with a '^' can be played on other platforms, so if you can always delve into them without AA. However, AA does do them without ads nor IAP (although whether or not it'll be good is still another matter). And if you have AA anyways (as part of A1, or you have AA for other games), you do get those games. OTOH, you can always access those games on Steam, Switch, PS4, PS5, Xb1, XbsX|S if you have those anyways.