eero Pro is the answer IMHO
I've installed a bunch of them. eero was a startup to address this problem. They were so successful that Amazon bought them. Things I like about them is their focus on this product (not just another networking product in a portfolio of junk) and that they have real live tech support that will answer the phone and know what they're doing.
More important I suppose is that they have a dedicated radio for backhaul as mentioned already. Well, if you get the Pro models. Setup is super easy. Every install has been a success with zero complaints.
