Numbers 1 & 3 are Flycatchers I think. Possibly the same species but which one I've no idea. Number 2 I also haven't got a clue. The bird appeared to have a very short tail although it might just have been the angle it was perched. Number 4 is possibly a Summer Tanager inbetween plummages.
This were seen a few days ago on my Costa Rican holiday in the tops of trees and scrub surrounding a car park near Playa Conchal.
You better stop dreaming of the quiet life because it's one you'll never know!