What is the name of an author of Write Excuses best known for the Cosmere universe?
Writing Excuses: Writing Excuses is a (nominally) fifteen-minute-long podcast hosted by authors Dan Wells, Brandon Sanderson, Mary Robinette Kowal and web cartoonist Howard Tayler. Brandon Sanderson:  He is best known for the Cosmere universe, in which all his adult fantasy books most notably the "Mistborn" series and "The Stormlight Archive", are set; and his work in finishing Robert Jordan's epic fantasy series "The Wheel of Time".
Brandon Sanderson