Man i love those massive fan leaves.
Looks like one has a nitrogen toxicity and looks like the others want some nitrogen.
I'd say hit them with a nice dose of calmag, either a 2-0-0 or a 3-0-0. That should green them up.
Edit: i'm almost positive a little nitrogen and magnesium will help the front two and the back right plant.
But the back left one (the curled down leaf one) definitely has a nitrogen toxicity, thats what that leaf claw comes from; at the same time it looks kinda light colored and usually the curling is super dark green along with the rest of the plant, maybe just hit that one with a hefty dose of epsom salt or just something that is magnesium with no nitrogen