For the 1950s, well it's a Hutton hat-trick isn't it? What a player. For the other opener, I am going to give a vote to a hugely underrated Aussie opener, Colin McDonald. I expect Hanif to get the nod for the team, and he was probably a greater player overall, but his career was split more evenly across the '50s and '60s. McDonald made very tough runs against very good attacks in an era when runs were hard to come by. Interestingly - and people of course put different levels of importance on this - if you pick an all time Australian XI based on their peak ICC Ratings, McDonald opens alongside Hayden.
We're spoiled for choice in the upper middle order but I'm going to go with Clyde Walcott at first drop, just edging out Harvey and May (and Sobers, in fact) - once he gave up the gloves and became a specialist bat he was a run machine.
Alec Bedser had his career defining series against Australia in 1953, Fred Trueman burst onto the scene brilliantly but with a skewed home record, and Fazal was excellent everywhere and virtually unplayable on matting. But I'm going to let my Aussie bias perhaps cloud my judgement and choose Lindwall and Davo to take the new ball.
Len Hutton and Colin McDonald
Clyde Walcott
Ray Lindwall and Alan Davidson