New Versions of old Dungeons (Like Deathmines) still counts as a classic Dungeon.
Would be nice if you argue why do you think Exnpansion X have the best Dungeons
And dont let have nostalgic a to big impact on your choice.
I had the most fun in cata, but had cata the best dungeons? Probably not.
In wod i barely played pve, but i have the feeling that WoD had really good dungeons.
Mop dungeons were kinda short and boring/annoying. I never liked legion m+, bfa felt meh because i felt to be forced to do them, because many BiS pvp items came from m+ and shadowlands dungeon feel often kinda boring, cause many of them have the same setting/theme, like halls and deeps and theater and plaguefall.