I'll repeat some already mentioned but ideal guys (can bat a bit, and have a bit of a dip) for number 8 could be....
Australia- Lindwall, Davidson, Benaud a few of the keepers like Healy/Marsh, Warne. Guys like Lee and Gillepsie were capable up the order at times.
South Africa- Shaun Pollock, Procter
Eng- Verity. Knott if Botham was at 7. Botham if Ames was at 7.
Pak- Wasim Akram (ideal imo)
India- Kapil could go that low, as he's their first picked quick. Kirmani/Engineer (if Kapil was at 7)
NZ- Vettori and Hadlee.