Paulo is right about D'Angelo--just be sure to stick to the Aglianico del Vulture DOC, and not D'Angelo's fancy-pants releases, like the Serra delle Querce IGT, which is 30% merlot and is aged in the dreaded barriques
Also, Botromango, which by the way makes wonderful whites, is another practitioner of barrique
ageing. Skip their Pier delle Vigne if you don't want oak.
The only producer I know of who puts out a reserve wine without resorting to oak is Paternoster, which makes Don Anselmo from very old, very low-yielding vines. It has more forward fruit, making it more "modern," but it has not been gussied up with oak.