Borderlands 2

[Triscuitable]

So far I've only touched Axton, two turrets or a nuke turret, it's so hard to choose... (Nuke won out, it does like 300000 on average... :P)

The two turrets can provide a lot of cover, and make for very useful distractions. The nuke power is very limited as well, and does closer to 90k damage. A good rocket launcher in the late game is comparable.

Here's a good suppression Commando. The trick here is to lay down your turrets ASAP, getting a good buff for doing so. A cooldown relic and class mod will also help tremendously here: keep the buffs going, and make sure the shield on your turrets is available to provide allies with cover. Laying down a turret for a Gunzerker to spray by, or give a Siren time to recharge her shields and action skill is incredibly helpful.