Provorov and Patrick are the only players that I really don't even want to hear trade proposals for. Provorov is just not on the table for me in any realistic scenario and Patrick's upside is so high that I can't imagine a team offering something worth dealing him for.
Ghost, TK, Couts, and Giroux are all guys that I don't want to trade but I would listen to offers for and unless my instant reaction is "this is an overpayment that I can't pass up" I keep them.
Sanheim and Lindblom aren't far from the list above but if there's a good deal on the table, I wouldn't be afraid to move them though I don't think their value around the league is as high as we are on them.
Voracek and Simmonds are guys that I don't necessarily want to trade but they have some value and getting some younger, cheaper players in return wouldn't be a bad idea.