I will talk a bit about the roles Stoutland can fullfill and its sets.
Stoutland is able to fullfill various roles in the current metagames, thanks to its plenty abilities, which combined with its high Attack and decent bulk, open a few options to it. The most common and famous one is the Choice Band / Silk Scarf set, and for good reasons: Scrappy allows Stoutland to basically mindless spam a strong STAB Return which along with an high Attack stat, is able to decimate even foes that resist it. It also doesn't fear status such as burn, as it usually runs Facade, which makes it even more threatening. This Stoutland set performs well against both offensive and defensive teams, because its ok bulk allows it to take most attacks, and retaliate back OHKOing a foe most of the time against offense, which have really few switch-ins against it, so something has to die. While against defensive-ish teams, it's just a steamroll, as this wallbreaker is hardly stoppable if not pressured enough, and common defensive Pokemon such as Clefairy, Togetic, and Lickilicky, don't carry enough sheer power to bring it down in time. Another good set is the Sand Rush one: this works better as a sweeper/cleaner, because it has access to an high Speed tier under sand, though it can't spam Return anymore because of the loss of Scrappy, so it's better used when Ghost-types such as Misdreavus and Gourgeist are eliminated, which can be caught off guard anyway by Crunch. I found this set lethal against offensive teams, as they often don't carry any safe switch in for it and just rely on soft checking the Scrappy set, which is way slower. The last set I have in mind is the Choice Scarf one that got brought into PUPL lately. I feel like this has a lot of potential, as it can surprise and outspeed various offensive threats such as Floatzel and Simipour, while still carrying enough power to OHKO most of them and once again by denying the possibility to offensive teams to soft check it, though it is easily checked by Pokemon that are gaining popularity such as Tangela, and people are recognising it so they are more weary, so I expect this to lose effectiveness during the time.
Now I would like to see the discussion be focused more on its competition with Pokemon such as Ursaring and Sawsbuck, as this has been an hot topic lately.