Not exactly creative, but pretty underrated right now imo:
Samurott @ Life Orb
Ability: Torrent
EVs: 16 Atk / 252 SpA / 240 Spe
Rash Nature
IVs: 29 HP
- Hydro Pump
- Ice Beam
- Grass Knot
- Aqua Jet / Superpower / Taunt
Samurott is actually pretty cool right now. Base 70 Speed is really good for a RU wallbreaker and Samurott has pretty amazing coverage to facilitate this. Hydro Pump is Samurott's STAB move of choice. To give you an idea of Hydro Pump's power, it does 50.5%
minimum to standard 252 HP / 4 SpD Uxie. Basically, you're opening with this move unless the opponent has an outright immunity. Ice Beam is nice for all the Grasses that think they can handle Samurott. Its especially useful for catching Virizion and Rotom-C on the switch (tho the latter takes a ton from Hydro) or straight OHKOing offensive Tangrowth. Grass Knot is necessary to handle Alomomola, Seismitoad, and Jellicent reliably while also giving a 100% accurate option vs. Rhyperior which is never bad. Samurott's 4th slot is basically filler as it has most of what it needs in 3 moveslots. Aqua Jet gives Samurott some utility vs. more offensive teams by allowing it to pick off weakened threats. Superpower gives Samurott some added coverage that can be useful against more balanced teams. Its main use is ensuring Registeel doesn't completely wall Samurott. Finally, Taunt has merit if you need Samurott to perform better against stall teams as it allows the otter to cutoff means of support and recovery moves on defensive Pokemon it can't immediately break through. Knock Off seems like a really good option, but most of the primary targets are already 2HKOed or OHKOed by the appropriate special attack (Jellicent by Grass Knot, Uxie by Hydro Pump, and Gourgeist-XL by Ice Beam) The EVs maximize Special Attack while outspeeding Modest Exploud. Literally nothing sits at base 70 besides Samurott and any defensive Pokemon aiming for that benchmark creeps Tyrantrum at base 71 anyway, making max Speed nearly useless. Remaining EVs are put into Attack so Aqua Jet and Superpower have a little more sting to them. If you absolutely need Samurott to outspeed Adamant Tyrantrum, Naive can be used to allow this. However, there's a noticeable drop in Samurott's power when doing this, most notably losing the near-guaranteed 2HKO on Uxie with Hydro Pump alone thus making Rash the better nature in most cases. Oh, and don't throw Samurott into Torrent range. Hydro Pump is a literal nuke at that point, doing over 40% to the standard Amoonguss spread just to give you an idea of how powerful it is.
So now you're probably wondering, why use this over Clawitzer? Samurott's higher Speed tier is the main appeal. It is capable of running a +SpA nature and still outspeed the likes of Exploud, Jolly Scrafty, and Adamant Emboar. Being able to outspeed virtually every slower wallbreaker in the tier and OHKO / 2HKO it with the proper move is a huge boon for Samurott. Samurott's ability to simply use Hydro Pump in the face of most bulky Pokemon neutral to Water is also a plus, making it harder to punish coverage options. Speaking of coverage, Samurott's access to Grass Knot is huge. SpDef Almomomola and Seismitoad are generally viewed as reliable checks to Clawitzer, but Samurott nullifies them instantly with Grass Knot. Lastly, Samurott's ability to use utility options in the 4th slot over coverage gives it more overall use to most teams. It can run priority to not fall flat vs. offensive teams, still utilize coverage to hit Registeel, or simply be a stallbreaker with Taunt. All of these are things Clawitzer can't effectively do. Obviously, Clawitzer has more raw power than Samurott with 11 more base points in Special Attack and a bit better special bulk (tho not by much considering Rott's higher HP stat) It can also effectively utilize Choice Specs thanks to its access to U-turn. But such a set can be hindered by the fact that Clawitzer's most reliable STAB option is Scald, a move that is more predicated on getting burn chip damage to push past neutral targets whereas Samurott can simply rely on the damage output of Hydro Pump.