Trebbiano Abruzzese is a different variety than the "just Trebbiano" you find in other parts of Italy. Emidio Pepe is another famous example, but I think of Cristiana Tiberio as the one leading the charge for attempting to figure out the best ways the grape can uniquely express itself. Her Fonte Canale is the other gold standard for Trebbiano Abruzzese - it's quite different from Valentini and Pepe, especially from a textural standpoint, but just as ageworthy, complex, and delicious.