TJ Watt is only a post June 1st trade option in all realisty.
Ramsey and Heyward are likely just cap casualties IF we need the cap space. And without a QB on the roster right now sucking up big time money, I'm not sure what we need the cap space for. That could change as the off-season progresses and we have some guys likely worth giving money too (Porter, Jones), but those decisions will be somewhat impacted by new coach and new plan (if any).
I think Metcalf is here for 3 more years. I don't see any reason to trade him. Whatever QB we get, even going into "Project 2027", will need a guy to throw to and Metcalf offers something on that front. Highsmith is the same thing. We need a body. He's suitable. Expensive but not crazy expensive to worry about at this point.
That's all the expensive guys worth talking about. The rest of the roster is cheap and not really extended much past 2028.