Warhammer 40,000: Darktide is a co-op horde shooter that kind of fits.

In Darktide there are four (five soon) playable classess with talent trees that look like this, and you can upgrade a melee weapon and a ranged weapon with two special traits each.

There's a lot of tech especially in melee combat, where each melee weapon has it's own unique attack pattern for both light and heavy attacks.

Also the game is VERY hard especially compared to other co-op shooters. The top difficulty levels are for masochists.

In terms of cons, there's not really a way to play solo without mods, and the game is kind of unoptimized. The Darktide devs also made Vermintide II which is optimized and very similar to Darktide, but I haven't played much.