The term GOAT is bigger then achievements. Its thrown around to much. It about the total take over of a sport. From an economical stand point the sport will not be as good without you. In my lifetime I have only witnessed 2 goats in any sport. Micheal Jordan and Valentino Rossi. Love him or hate him his domination of the spot has lasted longer than his talent. Motogp will long rely on him for a long time yet. Greatest of all time should not be a term thrown around for the .... of it.
You never seen Tom Brady?
Good post Dub and entertaining discussion, though it's got no definitive answer. I don't like the term goat for many reasons, first, it's impossible to define, in MotoGP if we're talking numbers only, I'd say Agostini certainly has a legitimate claim to the throne. But if you start factoring in other intangibles like sheer talent, skill, popularity, economic impact, longevity, etc., then what gets more weight? For example, few people will put Casey Stoner on the goat list, that's because most will weigh popularity, longevity, number of titles, disproportionately to outright skill, talent, speed, and doing it on an inferior machine. Would you say Rossi had more motorcycle skill than Casey at their respective peaks? Not me. Then there is Marquez, doing astonishing things on a 'RCV'. How much do we weigh he's doing this on a machine/team/manufacturer that is the most resourced, engineered, and supported? How much do we weigh Rossi accomplished his first 5 titles on special tires? If we put all the goat candidates on the worst bike of the grid, say the Ducati 07-10, who wins? If we put all the goat candidates on the best machine, say the RCV 2013-14, who wins. Hypothetical.
Then there is the question of Wayne Rainey, who likely would have continued his run of consecutive titles until Dog knows when. King Kenny, the only motorcycling 'Grand Slam Club' member to win a MotoGP title, in his rookie year, that is, how much single season perfomance is weighted into goat consideration? It's clear popularity is by far the most weighted factor, it's about perception of who was the goat, in this case the modern cult mentality choice will be Rossi; otherwise Agostini on numbers alone is the goat.
Regarding other sports, a few names come to mind. But let me say, I don't personally consider Michael Jordan the goat, especially considering the team he was surrounded with, but as I said, because of modern marketing the perceptions become skewed. What about LeBron James then? I think individually, Tiger Woods is the goat of golf. Most people will say Ali is the goat of boxing, I personally don't, Mike Tyson for me. But ask 100 people on the street, 100 will say Ali. Even people who have never been fans of boxing, so perceptions win out.
Other names that come to mind, Pele and Maradona. Both considered the goats. Interestingly, today many say Messi is the goat, yet has never won a national title like Maradona. Ronaldo is considered a co-goat with Messi, who recently won the European championship with the national team. So what factors get more weight?
F1, Michael Schumacher. Olympics? Growing up I always thought Bruce Jenner was something of a goat, when I was in elementary school, I read about Jim Thorpe, I'm convinced to this day he was the Olympic goat, but most people today would say it Michael Phelps.
Baseball, most will say goat Babe Ruth. Not me, but like Michael Jordan, Ali, Rossi, the modern perception, especially immortalized in media, wins out. Who can argue against The Sandlot's mythical hero, Thee Babe, the Great Bambino, the Sultan of Swat, the Colossus of Clout, the King of Crash...get the 'picture'? Being a baseball fan, i know its more popular to honor hitters over pitchers, but the goats for me were names like Sandy Koufax, Nolan Ryan, Greg Maddux, but the public insist it must be a hitter to be a goat, my names are Willie Mays, Hank Aaron. But Hollywood wins the battle of hyped popularity, thanks to Neale's glorification biographies masqueraded as MotoGP movies, Rossi's name will be the mythical hero, and his legend will certainly out grow his real accomplishments.
NFL, Tom Brady. What about Bo Jackson then? Joe Montana? Jerry Rice, Sanders?
Hocky, Wayne Gretzky.
NBA, Wilt Chamberlain?
Supercross, The King of SX Jeremy McGrath? Or the supposed "goat" Ricky Carmichael?
I agree with your general assessment, VR will forever be the "goat" of GP on perception alone, the fact is popularity is by far the most weighted factor.
Edit to add: Mike Hailwood. From reading about his career and what he accomplished, he's definitely honorable mention, but like I said, popularity wins perception.
If you live in a glass house don't throw rocks.