Merely my opinions, not saying certain games are bad, I just don't enjoy them.

Best:
Civilizations V w/ Vox Populi
RoboQuest
Divinity original sin 2 w/Epic encounter 2 & addons
Grim dawn
Elden ring w/Seamless Co-op
Wildermyth
Satisfactory
Salt and Sanctuary

Good:

Player unknown battleground battleground
Endless Legends
Warhammer 40,000: Rogue Trader / not best experience as non-host
Borderlands 2
We were here
We were here too
We were here together
Portal 2
Dungeons 3
Orcs must die 2
Orcs must die 3
Battle for Wesnoth
Salt and Sanctuary
Overcooked / complete edition
Cook serve delicious 3!?
Wrath of the Righteous /On a single computer, splitting party in combat

Meh:

Torchlight 2
Baldur's Gate 3
Pit People
Serious Sam: First Encounter
Divinity original sin 1 w/Epic encounters
Biped
Remnant 2
Operation tango /too short
Soma /just watch, someone just ran passed all the scary stuff
Heroes of Might and Magic 3 /Boo didn't enjoy it
Wizard of legends
Children of Morta
Cook serve delicious 2!!
It takes two /Extremely easy
Civilizations VI
Resident Evil 5

Bad:

Dota 2
Don't starve together
Zero hour
Morkredd
Amnesia rebirth w/ Parsec
F.E.A.R 3 /did not work
Aragami 2
Moon hunters
Outward