Sam, Azazel, Dean(implied wincest),  the brothers, and Castiel here.

Dean, Castiel, Sam, crossroad's demon, Azazel, and the brothers here.

Dean, Azazel, Sam, Castiel, and the brothers here.

Sam, Azazel, Castiel, Dean, and Winchesters here.

Anna Milton, angels, Missouri Moseley, Sam,   Dean, Alistair, and Castiel.

John, Sam, Azazel, Sam, Cassie Robinson, spoiler character for 4.12, Castiel, and Dean.

Dean, Daniel Elkins, Hell, Dean, Sam&Dean, and Castiel.

Sam, Castiel, Sarah Blake, Ben&Dean, Bobby, Dean, and Sam

Sam, Castiel, random, Dean, Ruby, Uriel, Cassie, Mary, Alaistair, and Lilith here.

Azazel, demons, and Hell here.