Which guns are best in each mainline Resident Evil?

[Ridley Lockhart]

So I've recently picked up Resident Evil 4 for the second time on PSN.
It's great fun and very terrifying, however one thing that bugged me is how little item storage you have.
I've played through Resident Evil games before with these kinds of things however a lot of the ones I played had storage chests like Resident Evil 2 Remake and Resident Evil 7.
So which gun should I sell/drop and which ones should I get? I don't really want to waste storage on meaningless guns that do no damage so I'm curious to see which are best.
Please let me know.

In REmake, there is a grenade launcher glitch which will give you infinite rounds, Acid, Incendiary, Explosive. And that makes the game wayyy easier.