No 1 I think is the yellow form of Mangrove Vireo.
No 3 I think is Yellow-green, but if the dark edge of the crown is black and the yellow on the underside is reflections from leaves, then a Red-eyed Vireo which would be a migrant in that area.
Thank you Niels,
I had yellow-green Vireo for photo 3 and yellow-olive Flycatcher for photo 4, so you confirm my initial thoughts.
Photo 1 is still puzzling me: you suggest Mangrove Vireo, but I do not see the wing bars....
Too bad for photo 2...as these small flycatchers are so tough...