>>58798259A theoretical skill-maxed Swampert loses out to a Dedenne with a single Skill Trigger M, and it cannot double skill bank as it's not a skill specialist.
On the other hand, Swampert has type diversity (ground vs electric), requires fewer main skill seeds if you're serious about it, and still produces more strength overall before cooking.
Other Tasty Chance S options include Cramorant and Sneasel/Weavile, once again not skill specialists.
Holiday Spheal on the other hand, IS a skill specialist, but cannot evolve, though is the 2nd best Tasty Chance S user despite that.