Well DUS indeed is a very good option, so much so that I'm thinking of suggesting you clod your way over to LHR to do it there.

So here are the LCY options (not all currently running):

Amsterdam Dusseldorf Glasgow Malaga Rotterdam
Angers Edinburgh Granada Mykonos Santorini
Bergerac Faro (Algarve) Hamburg New York - JFK Venice
Billund Florence Ibiza Nice Zurich
Chambery Frankfurt Isle of Man Palma
Dublin Geneva Madrid Quimper

Only FRA, DUS and HAM are there. HAM is therefore your best option, normally that's OK for B2B but sometimes they bus you down to the baggage hall and it's a fair walk around via security and passports to get round. Still do-able, but I'd rather suggest LHR-DUS.

Is GVA an option price wise? ZRH is also not too bad, but not my first choice. PMI and BLL are easy too, plus any of the smaller airprot.