@oralloy,
Apples to Oranges--the constitution vests the power to create an regulate executive branch offices, and to appoint the lesser officers
in Congress. The passage you cite does not abrogate that power. In fact, the contemporary activist, conservative court has recently determined that the executive power of the President
can be limited, and specifically in cases in which the President fires a lesser officer. This goes back to FDR in 1933--see
Humphrey’s Executor v. United States. It goes back even further than that, though, to 1867 when Andrew Johnson attempted to fire Stanton, the secretary of war--but the Court upheld the tenure of office act. (In fact, were Congress not spineless, they could have prevented the firing of Comey.) It was on that basis that Congress impeached Johnson, but failed to convict.
My advice to you is that if the stakes are high, get a lawyer. You wouldn't want to represent yourself. Don't tell me what is usual on-line, I have no respect for your intelligence, your knowledge nor you grasp on reality. If you're going to shoot your mouth off about the constitution, you need to read and understand the document first; then you need to read and understand the history of judicial review. You clearly do not understand any of those things.