Does Congress have the power to impeach and remove the Director of the FBI? If so, the Director of the FBI is subject to impeachment and removal by Congress; and can be removed by the president.
Does the president have the power to fire the Attorney General?
FWIW, the line between "inferior" and "superior" is a little murky. But I take your positions as:
I think your summary of my positions look pretty accurate and fall in line with the text of relevant constitutional clauses “cited”.