The best shotgun in Call of Duty: WW2 must be good at dealing with many enemies at close range. The Toggle Action semi automatic shotgun is a good candidate which can be used to kill many enemies one after another due to the high fire rate and damage of the Toggle Action shotgun. It is reasonably easy to use given that you have managed to get close to enemies.
However, there is an even better shotgun that has a little more range than the Toggle Action shotgun. The Combat Shotgun is a pump action shotgun with which you can often take out enemies in one shot. With it you can go through enemies quickly and don’t have to worry about running out of slugs due to the ample supply you get relative to the fire rate of the shotgun. With the Combat Shotgun you can be sure to handle many enemies in close quarters. Therefore, the Combat Shotgun is the best shotgun in Call of Duty: WW2.