You have listed lots of names that don't appeal to you. Throw out a couple suggestions, maybe that gets the discussion going in the direction the thread was intended.
Here is a list of names I would be good with from teams that may be sellers and guys that may be on the move:
Stastny
Zacha
McCann
Strome (either one, though I'm not sure Ryan is available)
Suter (this is really pushing the limit and I'm not sure he would be viable as he has another year)
Copp
Obviously it's a short list. Some people might think those guys are worth more than a 2nd, but most of those should be able to be had for a 2nd+something lesser than a 2nd at most, given the bandwidth taken up by guys like Hertl, Miller, Giroux, Pavelski, etc if they end up on the block.
Some of these have been brought up already in this thread, and you'll notice I didn't list them in the guys I didn't like for a 2nd. The point is we want to use a 2nd to upgrade Gaudreau, so bringing up guys like Blake Lizotte, Chris Tierney, Johan Larsson doesn't really do anything because none of those are offensive upgrades on Gaudreau.