Melchizedek- king of righteousness, king of peace. We know virtually nothing about him, or his kingdom.
Uriah the Hittite- mighty man of faith and valor.
The angel that killed Herod- I wanna know if God specifically sent him there to kill Herod; or if he had license to kill and he was just passing through the area, heard the people worshipping Herod and was like "nope, wrong".