Hulk Captain America Winter Solider Antman (though I have seen about 25% of it, and then something came up preventing me from seeing all of it. Homecoming Black Panther
Of all these, I think Winter Soldier is the only one you need to see.
Black panther is pretty important
As it pertains to the events in IW, I would respectfully disagree (especially since TC has seen Civil War), but I'd love to hear your thoughts (just be sure to mark IW spoilers or maybe DM me if you want, just to prevent TC getting spoiled)