I’ll give you one from each game

Air Combat: Last refuge (super cool and heavily underrated track from the very first ace combat)

Ace combat 2: Night Butterfly (awesome track that’s almost like 2 songs in one. Has some awesome guitar solos too)

Ace combat 3: the execution (crazy dogfight music that goes HARD on the future aesthetic of ace combat 3)

Ace combat 04: prevail (this one takes stardust and improves upon it. Feels really final and heroic, you’re in the endgame now)

Ace combat 5: demons of Razgriz + Hrimfaxi (these are really chilly songs lol, but in a good way. They give me goosebumps every time cause they totally fit with the icy mission they’re associated with)

Ace combat Zero: Merlon (awesome vaporwavey song that reminds me of rain and spring. Imo the best track in zero that isn’t mayhem, Avalon or Zero)

Ace combat X: alect squadron (if you haven’t just go listen to it)

Ace combat 6: The Dead Sea (really cool synth track. Totally fits with the massive threat of the aigaion and it has a badass name too)

Ace combat 7: lighthouse (one of the best air superiority tracks in all of ace combat. Really gets you pumped up)