DLCs you can safely delete without game breaking
If you download the GRAND THEFT AUTO V / GTA 5 – V1.0.2802/1.64 ONLINE from fitgirl, you'll be unpacking a 108GB game.
A lot of that DLC is actually just online stuff that does nothing to the base offline story mode game.
Some of it however, adds skins for guns, new vehicles, guns and other races that the base game does not have. It also adds a bit more stability and patches old bugs in the original release. Along with a frame scaling option which the original game did not have.
If you go and delete all the mp DLC you'll end up breaking the base game too. You'll be unable to start the first Tonya strangers and Freaks mission that's needed to progress the game, unable to shoot from a bike or ATV, game will crash if you try to buy a weapon from AmmuNation if it has a Yusuf Luxury Finish, some mission just break and a lot more.
The only option is to keep all the DLC and have the game be bloated the whole time.
Well, I've played though GTA V story mode and kept the DLCs in another folder. Whenever an error would occur, I would quicksave near it, leave the game and then painfully move each piece of DLC back and fro from the temp location to the actual DLC location.
I 100% the game like this and did literally everything in the offline game.
What I'm left with are the DLCs which you must not delete from theGrand Theft Auto V\update\x64\dlcpacksfolder
mpairraces
mpbiker
mpchristmas2
mpheist
mplowrider
mpluxe
mpluxe2
mppatchesng
mpspecialraces
mpstunt
patchday10ng
patchday11ng
patchday12ng
patchday13ng
patchday14ng
patchday15ng
patchday16ng
patchday17ng
patchday18ng
patchday19ng
patchday1ng
patchday20ng
patchday21ng
patchday22ng
patchday23ng
patchday24ng
patchday25ng
patchday26ng
patchday27g9ecng
patchday27ng
patchday28g9ecng
patchday28ng
patchday2bng
patchday2ng
patchday3ng
patchday4ng
patchday5ng
patchday6ng
patchday7ng
patchday8ng
patchday9ng
patchdayg9ecng
So the patches are obviously included, but the DLCs now come out to be 6.7GB.
The game size is now 70.6GB. Hope this helps someone