I actually think the situation is complex, given there have been 4 unusually good riders around in the last decade or so at different stages of their careers. To take the emotion out of it on a bike forum, I see current tennis as somewhat similar; is Federer the greatest because he has the most titles, Nadal because he mostly beat Federer when he was fit but at a time he was significantly younger than Federer, or is Djokovic ( a year ago at least) better than both of them?
I was once considered moderate (for this Rossi hater's forum) in regard to Rossi, but the last year or or so has changed my view of him, although not about his riding, his competitiveness against current opposition at age 37 having provided further proof of his quality as a rider.
His previous manipulations were somewhat behind the scenes, and I formerly blamed the crazy element among his fans rather than him for the treatment of his competitors, including Stoner for whom it made GP bike racing so unpleasant that he decided not to continue. He is completely out in the open now, and him basically IMO managing to force Jorge out of Yamaha for the sin of winning a 3rd title for them was the last straw for me.
The interview with Uccio on the other thread was revealing, suggesting as it did that Rossi lives in a bubble informed by the likes of Uccio divorced from any wider reality. Povol has his answer now, it seems as though it was that bike racing seer Uccio who suspected skullduggery while the PI 2015 race was under way when no-one else did, including it would seem Valentino himself. If everything VR has said and done in regard to the supposed conspiracy against him was based on some fantasy concocted by Uccio, and Rossi has the influence to get the likes of Yamaha and Ezy to adopt his view, then GP bike racing definitely is a long way from Kansas. I would add that I am now convinced that Rossi genuinely believes in his conspiracy theory, so he perhaps isn't quite as malicious as I had supposed.