Larwood and Laker for me.
And I'm more than happy with Botham at no.6. The idea of Miller and Botham having no place at no.6 in an all time XI seems to be a recent phenomenon led by a younger generation who have grown up in a six batsmen/four bowlers world. Both men have traditionally been locks at no.6 in their country's ATXI and any expert panel assembled continues to select them as such.
I could understand reticence in picking a bits-and-pieces player just to have an all rounder, but the sheer value that a cricketer such as Miller or Botham adds to a team means than IMO they're impossible to leave out, and I have no problem selecting them at 6 given what bit you'll lose in batting strength compared to a specialist bat is more than made up for in your quest to take 20 wickets.