LT, seeing as it is my side we are talking about (Richard refusing to name his) what if Cowdrey (or Thorpe) dropped out, and Barrington and Botham moved up one spot? In this case the extra spot would be filled by either Statham or Underwood (depending on foreseeable conditions). Would you then select Stewart ahead of say Evans/Taylor?
Frankly, Knott is my first choice pick everytime, dont even need to think about it.
If he was unavailable, I would likely go for either Evans or Taylor despite their lesser capacities with the bat. Simply, I think for an all-time side I think you have to be all-time in your key skill. I dont think Stewart was upto this level (although he was no doubt competent) and I dont think he was ever selected in the 90s purely on the basis of his keeping skills - his selection was strongly influenced by his batting ability in an extremely poor batting line-up. Moreover, its not just about taking the chances that come your way, its also about talking 50/50 or even those chances that seem cannot be taken. Super skilled wicket-keepers are likely to do this far more often (especially against all-time bowlers) than merely competent ones. Then there are the other factors that arise from the great keepers, the control of byes, organisation of slip cordons, keeping up the tenor of the fielding unit and the like. Knott, Taylor, Evans have the edge on Stewart on all these areas - even if I was to weaken the batting line-up a little.