I'm quite certain about the ID of plant one and three!
I have many at my house.
crush the leaves and smell them!
btw, look at the white specks on the bark of plant one! feature is indicative of bunchosia.
also, thorns on tips of myrcianthes pungens, makes it very easy to identify as such.
also, quite certain plant 4 must be Eugenia!
good luck!