Imo Penn is pretty hard to beat. A long long career of such understated and refined work, which I think never really dwindled - that takes a special ethic.
For a non contemporary, I've always been astounded by some of Kertesz's still life work.
I agree, it's an area that seems neglected, but there are people who still practice it, and even if it is often from a commercial angle, I don't think that should lessen ones appreciation for it. Erwan Frotin with Art and Commerce comes to mind.
I just started a still life project too, which certainly isn't for everyone, but it's a work in progress (
here).
BTW, lesd, really enjoyed Abelardo Morell's work. Thanks for pointing him out.