顾恺之 (Gù Kǎizhī) is the most famous in popular memory — the Tang-era copy of his 《
女史箴图》 (Nǚshǐ Zhēn Tú, Admonitions Scroll) is a star object at the British Museum.
张僧繇 (Zhāng Sēngyóu) gave us the chengyu
画龙点睛 (huàlóng diǎnjīng, 'paint dragon, dot eye').