I want my cpu to last a long time and not shorten its lifespan. "Enough" I mean to cool the 14900k at 100%(no OC).Define "enough"
A good twin tower air cooler will work well.
It just won't get the last 2% of performance that a 360 aio would.
The very best would be the newly released noctua NH-D15 G2:
https://www.anandtech.com/show/21502/the-noctua-nhd15-g2-lbc-cooler-review