Besides the (in)famous
Gandalf Elminster and Aragorn Drizzt, who is the elf/half-elf lady on the cover of A Grand Tour of the Realms?
I'm going to say Arilyn Moonblade. That book uses the same cover art as Realms of Valor, which is a collection of D&D short stories. The back of Realms of Valor states
From the secret annals of Realms history come eleven never-before-published tales of valor, featuring the greatest heroes of that magical world—Drizzt Do'Urden, Arilyn Moonblade, Adon, Elminster of Shadowdale, Jander Sunstar, and many others—told by your favorite authors, including: R. A. Salvatore, Ed Greenwood, Douglas Niles, Troy Denning, Christie Golden, and others.
Plus the image fits closely with the cover of Elfshadow on which she is featured.