Dante is fairly large...I'm not sure who the largest would be, though. If they've shown up recently I may not have seen them either.

[Assuming this person was telling the truth, which Pollo doesn't really. That seems to be the premise this person's working on, though, so he can do that.]

At any rate, they aren't the only ones who would object to any form of tribute. Ponyville can handle itself against much worse than a large dragon.