Out of interest, what do you consider to be their good platformers from that time period?
i think their very best is smg2 and nsmbw. the first super mario galaxy is also great, but has problems fixed in smg2.
i liked yoshi touch & go, kirby: mass attack, and canvas curse. those are on the unconventional side i guess. i remember enjoying yoshi's island ds, but i haven't played it in five years. never played super princess peach. wasn't crazy about wario land, but didn't think it was bad or anything. same is true of return to dreamland.
i think that covers all of the ones i played. if drill dozer is included then that's also not one i'm a fan of but might give second shot someday.