I read that after patches GTA V is now around 95GB.
Call of Duty: Black Ops Cold War is around 200GB fully installed with all features (HD textures etc).
Some people have insinuated this is intentional to crowd out other games on console hard disks and make moving away from CoD have an opportunity cost. It's probably just laziness.
I haven't looked into it in the past but some prior offenders had a lot of space wasted from uncompressed multi-lingual audio. Instead of letting us choose a language it installs them all so you can switch in game, and uncompressed for saving the CPU for game logic. For CoD the optional HD texture pack is 38GB so that's still a lot unaccounted for.