Here is Angron before he takes daemonic form. Vulkan and his lackeys slew him in hand-to-hand combat.
Here is Magnus the Red, before the Space Wolves knock out his eye.
Here is the Night Haunter. He was last seen going toe to toe with Rogal Dorn
And lastly we have Perturabo. I believe a mass of Marines and Sisters brought him low.
Imperial Primarchs tomorrow!