The two main suppliers for Dark Elves are Kallistra and Pendraken - as the Kallistra range is based on the Pendraken figures, then compatibility should be very high between the suppliers.
Spearmen
Kallistra 701
Pendraken FDE2
Crossbowmen
Kallistra 702
Pendraken FDE1, FDE8
Witch Elves
Pendraken FDE7
Dark Riders
?? Perhaps a celtic style human cavalry?
Cold One Knights
Kallistra 704
Pendraken FDE5
Harpies
Pendraken FBG12 Gargoyles - they are human size flyers - but not really harpies
War Hydra
??
Bolt Thrower
Kallistra 703
General & Hero
Kallistra 707 command
Pendraken FDE10 and FDE4 also FDE3 and FDE9 sword armed
Sorceress
There may be a figure in the Kallistra or Pendraken Command packs.
Pendraken High Elf FHE6 has a wizard style figure, that is perhaps female.
Manticore (Mount)
Pendraken DN58 (perhaps a little small?)
Chariot (Mount)
Kallistra 705 chariots
Cauldron of Blood
I think the stove in the Pendraken Dwarf cooks pack would be a good basis for this, if the top was trimmed off.