Tl,dr: Singapore for food/drink if open, Priority Pass for food after that, Asiana for relaxing.

Best *A lounge in ICN right now is the Singapore Krislounge. If it's open (it ties hours to SQ flights), start there. Best food, cocktails, and coffee, and pretty good for relaxing.

If you want the best food outside of SQ's lounge, if you have Priority Pass, the Matina lounges tend to have better food to a degree.

Asiana's lounges are best for overall relaxation and space, with passable alcohol and food that seems up to "basic" from the pandemic.