In reply to James S:
For things you probably won't have to queue for.... How about Chien Jaune 7b+ at Secret Garden (no polish, nice route despite the chipped finish) or Hogo Fogo (7c) at Olympic Wall (maybe a bit long but brilliant... take care at the start though). Also rather long (but there are rests), Ghost Rider 7b+ at Ghost Kitchen.
Fire Wall 7b+ at Arginonta is short and sweet (but maybe a bit busy).
If you want a major major project, Marci marc at Odyssey has to be the one (easy 7c+). Paris Texas 7c at the same crag might be a bit too hot for its small holds. Sirene 7c same crag will have a queue so not a good time for a project... ditto Polifemo 7c.
I would have thought Aegialis mid7c and Priapos easy 7c at Grande Grotta would have been too busy at the moment but I haven't noticed too many people on them this week. Bit long though.
For something new, try Call of the Ktulu easy 7c at Panorama, just left of Lulu (better to start up Lulu too) but again a bit long.
Tufa King Pumped? 7b+. A bit shorter. Too sweaty maybe at the moment, wait for a bit of a breeze.
Last suggestion: Blonde, top end 7c at Zeus, shorter, not busy, quick access (always handy for a project) and a mega route in the bargain.
Hope you find one of these absorbing!
Carl