Suggested addition to role compendium: Necrozma-Dusk Mane added to Stealth Rock. It is pretty solid defensively, and has enough bulk to effectively set rocks while potentially paralyzing or poisoning some of the opponent's pokemon. Add to this its amazing defensive typing, and you have a very solid rocksetter.
https://replay.pokemonshowdown.com/gen7anythinggoes-66616336
On another note, I do not understand the nomination of Clefable upwards. I have one answer to this: Offensive Mons. Clefable is easily pulverized by any powerful attackers or special attackers.. (Wink wink Pdon, Mray)
252+ Atk Choice Band Rayquaza-Mega Dragon Ascent vs. 252 HP / 252+ Def Clefable: 363-427 (92.1 - 108.3%) -- 50% chance to OHKO
252+ SpA Kyogre-Primal Origin Pulse vs. 252 HP / 4 SpD Clefable in Heavy Rain: 412-486 (104.5 - 123.3%) -- guaranteed OHKO
252 Atk Life Orb Rayquaza-Mega Dragon Ascent vs. 248 HP / 8 Def Clefable: 419-493 (106.6 - 125.4%) -- guaranteed OHKO
252+ Atk Groudon-Primal Precipice Blades vs. 248 HP / 8 Def Clefable: 354-417 (90 - 106.1%) -- 37.5% chance to OHKO
252 Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 248 HP / 8 Def Clefable: 482-570 (122.6 - 145%) -- guaranteed OHKO
Other thing: I am interested in hearing everyone's thoughts on whether or not Nagandel and Stakataka should be ranked. I would write up a nomination for Nagandel to D, but I do not have the time right now. I hope that someone else who feels the same way I do will have enough time to write a detailed nomination. I really am unsure as to whether or not stakataka should get ranked, but I am inclined to think D. What do you guys think?