Ossus as a flashpoint - fighting over the ruins of the Jedi Library would be pretty cool.
(I am correct here aren't I that at this stage Ossus has been sterilised by the detonation of the corsair in the Cron Cluster - should be a couple of hundred / thousand years previously?)
Otherwise, echo previous statements here, Dantooine, Kashyyyk, Onderon & Dxun, Yavin IV, Manaan and I think Muunilinst - take down the banking clans