pc case fans?

My issue leading to the question: My case is from acer (I like it even if it isn't the best) and I put a 1060 single fan gpu in it.

Fan is facing bottom of the case (maybe 2 inches or so from bottom) and even with fans curve set to like 70% rpm (around 2500 I think?) when temp hits 60c. Just playing OW at 1920x1080 it raises up to 71+ after hour or so.

Case has literally no fans except the one from my psu.

So I am wondering whats a good intake fan (140 or 120) and outtake fan that could help get rid of the high heat that is happening in my case.

Sadly liquid cooling isn't available for the single fan 1060 :(