Seems like the most common picks for ATG XI opening bats among seasoned cricket tragics seem to be Hobbs, Hutton, Gavaskar and (v. occasionally) Barry Richards.
They all, however, seem to have automatic disqualifiers under each person's criteria:
Hobbs: Played in the 1920s with very few professional players and low scientific training/professional standards, faced very few Test pacemen of note (Gregory, McDonald). Doesn't have a significantly different Test record to his longtime partner Sutcliffe, who is almost never considered.
Hutton: Very slow strike rate (for example, his 364 took well over 800 balls on one of the flattest decks of all time with Waite and McCabe opening the bowling).
Gavaskar: Lower Test average than the others, as well as playing half his Tests in pace-unfriendly conditions.
Richards: Small Test sample size because his international career was cut short by apartheid sanctions.
Personally I'd pick Gavaskar through his towering record against the Windies four-prong (both home and away, without a mutha****in helmet) and Hutton (best option on terrible wickets such as stickies and greentops). You?