I was listening and had a few list of my own as well :D
An old time PC classic that most people have the urge to play again from time to time - Diablo 2 !
This is back in the NES concole, it's about as hard as Dark Souls but people keep coming back for more - Contra !!
Enjoyed watching friends and own self get chased by kamikaze fanatics and raging bulls - Serious Sam !
4 person co-op to get from point A to point B while slaying countless zombies - Left 4 dead !
These are the co-op games I had fond memories of. Another is RE5 but you guys already mentioned it.
Aside from these lists, I tried playing RE0 and after a while I stopped :P not because it is scary, but because the resources is so scarce and gun aiming is so unreliable that I felt the stress everytime I saw an enemy. I bang and oh shit I shot a wall, there goes 1 shotgun bullet :P In the end I decided not to play as it adds to my stress, like you said :D
RE: STEEM Geek Podcast Episode#3 - Favourite Co-op Games of All Time!