I'll have an Australian bias here no doubt, because I am Australian and I actually do think we produce the best fielders, along with the WIs.
Ponting and MWaugh were similar in ways. Both had amazing anticipation and covered ground so well it looked easy. Ponting was the best throw I've seen, incredible ability to run guys out. Both spent the latter parts of their careers in the slips, MWaugh the best slipper I've seen, Ponting good safe as house in there. Remember hearing Waugh say once he got bored in slips and loved getting out to cover or point for a run around.
Symonds was just a beast at stopping shots and running guys out. Big physical presence, probably a bit like Clive Lloyd was in his prime. Sound catcher too. Brilliant anywhere in the inner ring.
Rhodes and Collingwood are the two other guys who obviously stood out as great in-fielders in my time of watching. I was young but I can remember Viv and Roger Harper.
Slips is a different tale, with guys like Taylor, Gooch, Alderman, Smith, Kallis all being great slippers.