Here is a list of those who were in the Trump White House from day 1 and have since quit, or been fired (via ABC News).   There have been more first-year departures from this White House than any in 40 years (Axios).

Gary Cohn–chief economic adviser

Hope Hicks–communications director

Rob Porter–staff secretary

Omarosa Manigault-Newman–Dir. of comm. for the Office of Public Liaison

Dina Powell–deputy national security adviser

Tom Price–Secretary of Health and Human Services

Sebastian Gorka–deputy assistant to the president

Steve Bannon–chief strategist and senior counselor

Katie Walsh–White House deputy chief of staff

Andrew McCabe–FBI deputy director

Anthony Scaramucci–communications director

K.T. Mc Farland–deputy national security adviser

Josh Raffel–senior communications official

Reince Priebus–chief of staff

Sean Spicer–press secretary

Walter Shaub–director of the office of government ethics

Mike Dubke–communications director

James Comey–FBI director

Mike Flynn–national security adviser

Sally Yates–acting attorney general