Right now I what I've been testing is
The GFX Mod: The ultimate tier has a lot of good things but it changed the colors a bit so a noon game in direct sun looks washed out on system. Late afternoon or night games the pitch is amazing. Also it has some changes to the goal kick and penalty cameras I didn't care for. The Basic tier okay but a bit to basic it gives you a good idea of how the field can look though. Finally settled on the Full tier which looks the best to me the pitch looks great and super realistic and doesn't have the weird camera changes.
FIFA Infinity Patch 20: I'm loving this one. It adds so much. The Brazilian League had all real teams, kits and players, adds the Russian and Czech leagues and a ton of other teams. Juventus is modded back in, I believe it even adds the Club World Cup and CONCACAF tournaments to career mode and that's just a few of the things I remember off the top of my head.
Paul 2K4 Career and Gameplay Mods: The career mod I haven't spent a ton of time with but you can edit everything about a player real, regen or ya, see an actual injury list of your league reverse or make transfers as you see fit etc. The gameplay mod does something for fouls I want to say it will actually call them for running the length of the pitch and tugging on a jersey and the little tiki tak fouls don't result in a yellow card as often and of course other things I'm forgetting. I used the mod with the OS sliders and it felt yood might need to tweak somethings though.
RealCam: As was mentioned this makes the broadcast camera look beautiful I spent lot of time just messing around zooming and tilting the camera to get amazing views.
Looking forward to trying out some of the face and kit mods.
Oh here's a random game I played with the mods on looks a little weird but I was trying some different setting on my laptop.
https://youtu.be/oiRoPxFEfDc
Sent from a galaxy far far away.