How about Caleb Smith from the Marlins, they seem to make bad trades all the time.
I don't mind poking fun at the Marlins, but the degree to which they make "bad trades" these days is probably overrated.
The Yelich trade looks bad, but the Marlins did get some highly rated prospects for him -- they've just busted so far, and Yelich took his game to another level. They likewise got an elite SP prospect for Realmuto too, even if that doesn't work out for them.
Their other deals have been driven by larger salary dumps (Stanton, Gordon, Ozuna), or misguided attempts to contend (Fernando Rodney). Neither of those would seem to apply to an asset like Caleb Smith, or even Jose Urena, or perhaps anyone now that they are nowhere near contention and their current payroll level is probably ideal (low, but not too low as to draw the ire of MLB and the MLBPA).
Still wouldn't hurt to keep an open dialogue, but I wouldn't count on getting good talent cheaply from them right now.