There's not much near Ebbsfleet, sadly. Having said that, you could stay at Stratford (just make sure it's Stratford in London, not Stratford on Avon!) - there's some good hotels in the Westfield complex, and you can travel to/from St Pancras or Ebbsfleet on the high-speed services.

There is something special about departing from St Pancras, however...