Tinkerlands. I just got it together with Novalands (which is a good time sink on switch). Haven’t started playing it yet, but it seems similar to terraria, but topdown and with more focus on coop.

I know the 2 games below have 2 player couch coop. Not sure if you can play with 4p local on EDF

• Dynasty Warriors 8 - beat up soldiers by the hundreds while watching Romance of 3 Kingdoms as a 3D anime. “Complete Edition” but still has fuckloads of DLC skins which aren’t worth it. Or just buy and pirate the actual complete thing later.
• Earth Defense Force 5 - Kill giant insects and aliens with building-destroying firepower. The story and narration in 5 takes itself too seriously, but it has many quality of life improvements over 4, which is overall a funnier game with the best infantry sing-along

Which ones have you heard of?

• Gauntlet Slayer Edition
  • Good old dungeon crawling. 2014 revival of an 80s arcade classic.
• Keep Talking and Nobody Explodes
  • Defuse a bomb with your friends
• CATO: Buttered Cat
  • Puzzle platformer featuring that joke about how cats and toast land when dropped
• Mosa Lina
  • Aggressively randomized puzzle platformer
• Assault Android Cactus
  • Arcade-style twin-stick shooter with pumping soundtrack
• Pizza Possum
  • Very soft stealth game about stealing and eating lots of food
• Moving Out 2 (or 1 if you’re fine with local only)
  • Drag and move furniture onto a truck

If you can forgive the self promotion and enjoy platformers. Our game has (an admittedly challenging) couch coop mode.

https://store.steampowered.com/app/1771200/Cat_Box_Paradox/

Depends on which you did hear of. Spelunky you probably did, but is Octodad niche enough?

Ooh, try Full Metal Furies. I personally mostly played single player, but I think co-op should be cooler, though I only played a few stages.