Slope-shouldered dreadnought is your best bet.

Generally, yes. That sound comes from a Gibson J-45 or similar slope-shouldered dreadnought — that’s what Jacklin plays on that track and live. The rounder upper bout and shorter scale give it a warmer, softer attack compared to the punchy, trebly square-shoulder dreadnoughts (like Martin D-28).

If you want that sound specifically, look for a slope-shoulder. Mahogany back and sides also help (rosewood is brighter). A smaller 000 or OM can get close, but you’ll lose some low-end fullness and volume. The J-45 is the goldilocks — warm but not muddy, loud but not harsh.

That said, don’t stress too much about the body shape if you can’t try one. A decent all-mahogany or hog-topped guitar with a shorter scale (24.75" or less) will get you 90% of the way there. The recording also has a bit of compression and reverb that smooths things out.

So: slope-shoulder dread > smaller bodies > square-shoulder dread. But your fingers and pick attack matter more than the shape.