Satoshi & Touko
Peanuts aren't just a nut.
More importantly, complaining about Ash taking away spotlight from other character is pretty much redundant since he is the face of the show, he is the focus of the show, he is the main protagonist of the show, this show follows his journey and goal, from the very start. Take him away, and what honestly remains in the anime? Pretty much nothing.
At best, if the anime was a fruit salad with, let's say, five different fruits, removing Ash would maybe take away one of those fruits. Sure, for some time it would feel like something was missing, but unless you were watching the anime solely or mainly for Ash (which I still think is a bad idea), then it would pass. There are still four fruits remaining and that missing fruit would get replaced anyway, so we would still have a pretty delicious fruit salad.