Seems like everyone, including Atkins himself, is open to adding a left handed bat but at this point it might be best to just dumpster dive at that spot. Kirk can be slotted in as the primary DH and Steamer projects him for 126 wRC+. That's not going to be easy to improve on. Atkins did say he'd be open to adding a lefthanded bat if it was better than the right handed bats we have now (or something to that effect) and I think he's referencing Kirk there.
So rather than paying a chunk of change for the Confortos or the Pederson's of the world who don't even improve upon Kirk much anyway, it might be best to just look at bringing back Dickerson for a couple mil. Jed Lowrie or Colin Moran could be had for next to nothing too. Villar could make sense, but he isn't going to be as cheap and he might have some PT concerns after we signed Chapman.