ok here goes for starters ... please note those listed below are not in any particular order or time frame but were all SERIOUS evaluations for which there is SUPPORTING references :)
Lockheed F.104A/C Starfighter, RAAF., 1958
BAC. Jet Provost 5, RAAF., 1965
NA. RA.5C Vigilante, RAAF., 1962 (favoured)
Vickers Valiant, RAAF., 1963
Boeing R/B.47E Stratofort, RAAF., 1963
BAC. TSR.2 Eagle, RAAF, 1963
Convair B.58A Hustler, RAAF., 1961
Dassault Mirage IVO, RAAF., 1963
SAAB. AJ/JA.37 Viggen, RAAF., 1972
Dassault Mirage F.1, RAAF., 1972
Grumman F.14B Tomcat, RAAF, 1975 (favoured)
MDD. F.15A Eagle, RAAF, 1975
MDD. AV.8B, RAN. (A.4 replacement)
another type looked at and assessed as a 'poc.' by the RAE. was the CAC. CA.23, Australias answer to the Lightning ... unfortunately this design did in no way bear up under scruitiny even tho being powred by the same Avon powerplant as the P.1B, it being just barely supersonic due to a number of major design faults!
... i will keep scanning through the references and add to this post when i come across any others... please feel free to augment the listing if you find any iv missed !