I'd happily acknowledge Barnes as the best bowler there's ever been, myself. And certainly conceivably one of England's best three cricketers.
However, his case is undoubtedly less unequivocal than those of the great batsmen of the '30s and '50s. There are still plenty who argue that his case to be a great bowler, never mind the best there's ever been, is not concrete. The sad reality is that Barnes spent the vast majority of his career playing Minor Counties cricket. If I could change one thing about cricket history, it'd be that someone made Barnes welcome playing First-Class county cricket for 25 years. Because I've precious little doubt that if that'd been done, no-one would doubt he was the best there's ever been.
RIP Fardin Qayyumi (AKA "cricket player"; "Bob"), 1/11/1990-15/4/2006