Fair, but I just thought it was a coincidence that those are two things they share in common. I can't even remember another one piece character with both those traits after all
Weren't Jabra and Absalom kind of silly?
Maybe his opponents don't get clowned on (besides Wadatsumi and Queen), but they do have a running theme of being far less serious than Zoro's opponents and are also the third in command of their respective organizations, which fits Burgess as he's actually the captain of the First Ship (which is above anyone else but Teach, unlike other Sanji opponents who usually are below the Zoro and Luffy opponents in crew hierarchy, but, still).
They absolutely do, I agree with that. That's why I think he's the strongest option, along with Pizarro (he's kinda silly too with his larger-than-life attitude and need to become famous and talked about in newspapers). Vasco Shot could fit too, but he lacks the goofy personality as of now, so it depends on what Oda does with him.
pizarro's ability sucks and for that reason alone i really hope he doesn't fight sanji
at this point sanji may just have to fight kuzan
Problem is they all have an ability that sucks.
Mark my words people, it's gonna be Van Augur 100%.
Kuzan would be epic though, you can never go wrong with the classic Scorpion vs Subzero, fire vs ice matchup.

vs
Bro, that's clearly Usopp's opponent. I see the appeal in that matchup you're hoping for, Sanji'd have to counter Van Auger's teleportation with his insane speed and it's rather cool on paper, but there's about a 0% chance he fights anyone other than Usopp.
Besides, Sanji's a martial artist and him fighting a sniper means we'd have a really underwhelming fight in terms of pure choreography, there's a reason Oda always gives him opponents he can trade blows with (yeah, I know choreography is underwhelming regardless, but not intentionally lol).