You have a lot of physical attackers, so Galarian Slowking is the best option. Crobat should automatically be eliminated because it's generally used as utility/a physical attacker, and Galarian Slowking has 10 more Special Attack than Galarian Slowbro. It's can be a bit of a pain to get, but it's very well worth it, as it hits hard (even if it isn't very fast). Here's a set:
Slowking-Galar @ Life Orb / Black Sludge
Ability: Regenerator / Curious Medicine
- Nasty Plot / Surf
- Sludge Wave
- Flamethrower / Fire Blast / Shadow Ball / Ice Beam
Hope I helped!