M.R.
Maybe you're over-rewarding him? You mention that you give stickers for brushing teeth, cleaning up toys, putting dishes away...maybe he thinks he needs to be rewarded for everything he does and he's resisting the dressing because he thinks he deserves something bigger and better so he puts up a greater fight?
We have a 2 1/2 year old too and yes, he frequently resists getting dressed. I pull out an outfit and if he balks at it, I ask him ONE time if he'd like 'this shirt or that shirt'. If he can't pick or says no to both of them, I pick for him. Same thing with the pants. Then, I just dress him as quickly as possible, which sometimes means a wrestling match and a meltdown, but I flat out ignore it. No comments and absolutely no attention to the tantrum he is throwing - I don't want to give any attention, positive or negative to the fit he is throwing. It's morning, he needs to get dressed before he can go about his day because that's part of the routine. I do not beg, plead, nag, or yell. We just get through it as quickly as possible.