Best? What is the best car? What is the best airline? What is the best restaurant? Best is in the eye of the beholder. One would have to try every conceivable alternative before deciding which was best … for that individual – the next persons experience may well be different. All hosts occasionally have a problem, have different hosting deals, etc. There is really no standard that can be applied to all equally.
I’ve used BlueHost for quite a while now and absolutely love them as a hosting company. You can use Fantastico or Simple Scripts for a one-click install, or you can just upload files the usual way. I won’t say they know absolutely everything when it comes to WordPress, however, I have found that their support tends to know a lot more, or is a lot more helpful with WordPress issues than my previous host was.