I usually go for the three best quicks and the best spinner. If picking an ATG team, I always have Sobers at #5 or 6, so there is a high quality fifth bowler.
So, for me it's-
The others I consider strongly are Wasim (left arm and a wizard), SF Barnes (but I find that early era thing hard to gauge), Ambrose (who I think was a better bowler than McGrath, but McGrath was more consistent. Ambrose could be hot and cold depending on his attitude) and O'Reilly (really hard to split him and Warne, but Warne's mongrel and will to win is so good).