The new supermods use Rub as a base so no need to install it.
Many here believe that GW is what SH3 should have been when released. GW has a very good balance of realism + eye candy. All the options you listed are included, except uniforms which there are many choices to use.
NYGM - Has strived to recreate the life of a U-Boat captain. To that end realism is the main goal with this mod.
U-Boat War Ace - Has a balance of realism + eye candy + Historical events added.
These mods contain fixes/addons etc that normally would see you have Rub + 20/30 extra mods just to get it the way you like it.
These are complete packages.
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