Not really, Bandana Dee is actually pretty important to his series unlike Lanky and Krystal respectively. And has appeared in many more games then either of them.
Let's count:
Bandana Dee-7
Krystal-2
Lanky-1
So as you can see the comparison is kinda off, (No hard feelings or anything I just wanted to put that out there), but also he's one of the major four now, while this is coming from a diehard Kirby fan that's played all of the games and knows just about everything there is from the series, I can wholeheartedly say, that the roster just feels a bit incomplete without him. :/ Of course this is only my opinion, you don't have to agree with me at all, I'm just saying that it's more like a gift after a nice meal and less like superfluous dessert, but again, only my opinion. So let's just agree, to disagree.
EDIT: None of you have to agree either, it's just my opinion, and I don't want to continue this discussion, as I can't see this going anywhere good... :/