In comparison to McLaren and Red Bull. And arguably few other.
What Alonso is doing this season is only proving his status of the best driver in F1. Kimi close 2nd.
Hamilton proved in 2008 that Alonso is not the best driver in F1. IMO both Vettel and Hamilton are better drivers. But Alonso in a good car is as good as those two on his day, but he couldn't handle it when Hamilton started to compete against him. So because of that and that alone he will never hold the No.1 status for me.
Unless he is joined by one of them one day in the future and gets the better of them in the same car and conditions only then would I change my mind.
Hamilton is a hot head and arrogant at times, and I prefer Button to him personally, but in terms of raw ability Hamilton is something else. Vettel too.