Well, since it's hard to decide the one bowler, I will go by team which I prefer as the best,
Pakistan - Wasim Akram
Australia - McGrath
WestIndies - Ambrose
England - Gough
India - NONE ( No & No consistent seamers in Indian side! they just play street cricket when comes to bowling.

May be, Srinath! )
SriLanka - Vaas
SA - Pollock ( no way, i can ever see such a talented chap again! )
Kiwis - Bond
Bangladesh - Mortaza ( not in bests of international level, but best in Bangladesh atleast )
Zimbabwe - Brandes ( Such a talented chap, but poor guy that he belonged to the team which hasn't had much success )
Those are from what I have seen.

And in spinners - Warne, Murali & Kumble should the top the list of three.