There is a gaping whole in your argument. It presumes normality.

Trump will appoint sycophants.

It doesn't presume normality. It presumes that people that aren't Trump syncophants won't be willing to risk going to jail for the rest of their lives for Trump.

Trump isn't going to get to appoint Seal Team 6. He's not going to appoint their immediate supervisors. He's not going to get to appoint all the individual soldiers who would be necessary to transport someone to Gitmo, or hold them there - all of whom would be guilty of state crimes which could not be pardoned, in addition to federal crimes.

And quite honestly, even a lot of Trump sycophants will still balk at actually committing an inarguable public crime for him. Trump is not a man who inspires a lot of actual devotion. It's not like you could have Seal Team 6 kidnap someone like Gavin Newsom and not have people notice, and I can't imagine any SecDef - no matter how sycophantic - being willing to take the hit of being arrested by California officials and counting on Trump to get him out of it.