Quinta de la Rosa (above) is well-known for its Vintage Ports - I bought a half-bottle of their 2009 for €15 when I went there at the end of June by the way - and sublime old Tawnies. They also make red, white and rosé Douro wines, like everybody else in this region nowadays; and I was quite impressed by this tasty dry white quaffed that evening, nicely chilled of course:
2014 Dourosa white - (Codega 50%, Rabigato 20% and other white 'Port' varieties sourced from "nearby vineyards with a higher altitude." 13.3% abv) Aromatic and quite intense, zesty yeast lees and floral aniseed notes, crisp dry and tangy finish. €6
Quinta de la Rosa is a pleasant walk over the river and up the hill from the town of Pinhão (well signposted), like several other 'famous names' based in this area, offering beautiful views across the Douro and up and down the vineyard-lined valley. You can stay there too - more info @ quintadelarosa.com.