Air India
Getting a bit carried away with myself here, but with Air India set to become a full Star Alliance next year and Aer Lingus rumoured to also possibly be one of the next in line for membership, this again would make Dublin an interesting option for Air India. That said, it would seem even more interesting to stay in Lufthansa-dominated Frankfurt, but I'm sure there are many strategic advantages and disadvantages to these wild rumours for all involved...
Minor detail: Air India aren't the most financially healthy airline, but granted, such airlines are few and far between.