Odo impersonates the female Changeling in DS9: Tacking into the Wind
Moving down the scale, we see him impersonate a Klingon Warrior named Kodrak in DS9: Apocalypse Rising. As has been pointed out in comments, this was a surgical alteration performed by Bashir (on Odo stuck in human form) rather than a shapeshift.
And he impersonates a 'generic Cardassian face' in DS9: The Courageous, Book 2 of the Rebels Trilogy. It should be noted that although he intends to hide his face behind a mask, it seems to pass casual examination without it.
Odo himself had suggested the ruse: he had been practicing shapeshifting to a Cardassian since DS9 was Terok Nor. His facial features hidden behind a mask, he could pass cursory muster as a "generic Cardassian." So long as they moved fast and the sentries were not particularly alert, there should be no alarm, thought Sisko.
It occurred to me," said Quark, with a bitter glare in the direction of Odo, still shapeshifted into a Cardassian visage, "that the Cardassians would never believe that the--the Natives would have the initiative to steal a skimmer.