Easy, initial answers are the Swiss Franc and the Norwegian Krone.
Expanding the thought experiment a bit, it's possible that CAD is, big picture and long term, in even a better position. Probably AUD as well.
The GDP of .ch and .no put together are 6% of the EU's.
I'm sorry, but they just aren't significant in the large picture.
"... are as strong or are in a better position, and are backed by stronger economies ..."
... and I would argue that .ch and .no are in quite a bit better position and are backed by stronger economies.
Easy, initial answers are the Swiss Franc and the Norwegian Krone.
Expanding the thought experiment a bit, it's possible that CAD is, big picture and long term, in even a better position. Probably AUD as well.