Interestingly, I’ve recently been testing various Ogryn playstyles, I even tried fully role playing as a brainless big guy, playing an entire match of Havoc 40 without firing a single shot, relying solely on my pickaxe heavy attacks, using taunt twice a minute, and still easily topped the damage.
No, Ogryn is the class that relies least on teammates, It is teammates who rely on Ogryn.
The Arbites are similar, only offer less support to their teammates.