okay so this is an excellent question and gave me the opportunity to revisit some of my faves, which was awesome, but then i realized that my faves are super basic and well known classics, which is like... well. they're classic for a reason, right? anyway i'll give a top three for both ships below:

GYUHAO:
1. give me a tempest by Klavier
2. me and my husband by knightspur
3. growing on you by haophelia

SOONWOO
1. loverboy by preciouslittletime
2. a mix of sun and clouds by geguri
3. sucker for you by dollyeo