There were a few "A" players that I found during my research, but based mostly on the fact that this is the one I'd love to have seen the most, I'm taking Warwick
Armstrong at 6. His all-round game steadily got even better as his career went on, not to mention his ever-increasing physical stature. This is apart from his rather...unusual...behaviour both on and off the field. You'll read on CricInfo that when an Ashes Test was headed toward an obvious draw, he went out into the outfield, began to chat, and even began to read a newspaper that was accidentally blown out onto the field. Or when the Aussie team picked a manager for the first time (to tour England in 1912), he refused to go because he never believed in the role of a manager...and actually was promoted to captain for the next Test. He had that sort of command over people.
I'll finish up my lower middle with
Leslie Ames. I found him while looking for the "A" picks, and I was glad that he could bat down at 7 too. In a time when wicketkeepers were picked only on the basis of their skills behind the stumps, Ames was picked for his batting first. That doesn't mean he was any part-timer with the gloves. 74 catches and 23 stumpings in 47 matches isn't too shabby for a player during that period. That little "record" under his CricInfo profile of most byes conceded in an innings? He wasn't even keeper in that innings! He had hurt his back while batting and didn't play any further part of the match.
His batting? In his 593 FC games, he had 102 centuries and 176 fifties. That's pretty good for a keeper. I'll take it.
@ahmedleo414