Trump is just another President, Bannon is irrelevant.
Unlike Hitler and Mussolini Trump faces an insurmountable obstacle to becoming a true tyrant and dictator. The Constitution and the designed in Checks and Balances. Hitler was able to achieve his position of power due to great flaws in the design of the government of the Weimar republic. There was nothing to stop him when as Chancellor the President died and he just took over the office. Further He came into office with his own private military/police force that engaged in the more dubious acts of his government.
That's incorrect. Hitler was elected on a platform of populism, then the population and his supporters slowly eroded away the protections in place until he could successfully be granted unilateral power.
The Constitution is only as powerful as the people willing to stand for it's principles. When you have a majority willing to piss on the Constitution, putting power and ideology before the good of the nation, then the Constitution just becomes a piece of inconvenient paper. Soon you'll be hearing how the Constitution is too limiting to deal with the challenges of today's world.
There is no means for Trump to seize more power in our government. And he does not have a private military/police force to enforce his will.
Oh yes there is. And you don't need a private military force when you have cult following who thinks your the second coming of Christ.
Additionally Trump is not beloved of the GOP establishment. That means neither side of the aisle in the legislative branch really trusts him. So far he is just fulfilling campaign promises so he mostly has their support. But should he start straying he will lose that support in a hurry. Neither party trusts him. (That's actually good, it means he will have to negotiate to get the stuff he's promising that require laws to be passed.) Neither party will stand for it if he were to try to exceed his constitutional authorities and limits.
That's irrelevant. The GOP is more than happy to use and abuse Trumps ham-fisted methods to further their own agenda and ramrod what they want through Congress, including expansion of powers. And just like Hitler did to his supporters when they started thinking he was going too far, Trump would have no qualms doing the same.
The ends do not justify the means. Making deals with the devil, even with the best intentions, never ends well.
Trump is not Hitler. He can't be. Hitler couldn't have been Hitler under our form of government. At most he could have been FDR and Interned citizens (but not exterminated them).
You really don't understand how this works, do you? Populism is a cult. No piece of paper or set of laws matter. Get enough followers and they'll be cheering as you burn the Constitution.