Valentino is certainly in the conversation, not Agostini imo; I am old but could still only follow him from afar rather than seeing him race, but from what I have read/heard Hailwood was better in all likelihood.
If you are going to award the 2015 championship to Valentino I could fairly easily award Mick Doohan 7 titles as well, or at least 6, he was far more dominant prior to his injury in 1992 than Valentino was in 2015 and lost by a similar margin despite missing several races and racing the last two on one leg, but if he wanted to win the championship that year he should have not crashed, just as Rossi should have been faster late season in 2015 if he wanted to win.
You can be a proud Italian all you like, but you still fail to address the "facts" which remain that Valentino is the guy who took out MM rather than the reverse, and that it is he and guys like you who have slandered MM and Lorenzo rather than the reverse.
I have taken no issue with your English, which is obviously far better than my Italian, it is with what you continue to contend that I disagree, and I won't give you a free pass on that for having a language other than English as your first language.
PS I have followed the "beautiful sport" from before Valentino, let alone you in all likelihood, were born. Again you seem to have a basic problem with comprehension, it is you who is slandering MM and devaluing Lorenzo's 2015 title, I have absolutely no problem with acknowledging the titles Valentino actually did win.