There are so many Alonso or Hamilton fans. The Alonso fans all want to say Hamilton is amazing, implying Alonso is also amazing since they were matched in 2007. The Hamilton fans all want to say Alonso is a god for the same reason (that it implies Hamilton is a god due to 2007). And then the only people going around equivalently raving about Kimi are his fans, and the same for Vettel.
To me, when you factor out that BS, you're left with that Vettel is clearly the most consistent and successful driver in F1 presently. However, Kimi is in an noncompetitive team and completely outdrove both Alonso and Hamilton during the majority of the last 5 years. Sure, you could say Hamilton out drove him in 2008, but then Button out drove Hamilton by an even larger margin last season. You could say Alonso outdrove Kimi 6 and 7 years ago, but you could also say that 2007 (where Kimi outdrove everyone) is more relevant and that the 2005 WDC really could have gone either way. In Alonso's case, there are almost 10 seasons now where he's been in F1 but only the 2 championships 6 and 7 years ago.
For lack of current and applicable data, we can't say Kimi is the best. Among the other 3, any sensible person has to acknowledge that Vettel has been head and shoulders above everyone else.
I prefeer to look at circumstances and not just sheer stats, so well, I kind of disagree with your final "acknowledgements", which rather than that are just your opinions.