So many to choose from...
Emperor Hirohito (or Hideki Tojo):
I would call-off the attack on Pearl Harbor to ensure the US stays out of the war. Japan would then focus on invading the entirety of Asia and India and aiding the Germans by invading Russia on the East Front, ensuring an Axis victory.
Fictional characters
Count Dooku / Darth Tyranus
Deathstroke / Slade Wilson
Grand Admiral Thrawn
Prince Xizor
Gendo Ikari
Tony Stark / Iron Man
Their powers would be used for personal gain and furthering the Sith Grand Plan all while implementing the principles of accelerationism and human transcendentalism.
The only other IRL person I'd be to aid in this would be Elon Musk
Id probably pick Jesus.
Immortality, can turn water into wine and if the stories are true, his gf is the type that defiantly puts out.
Id start in his time at the begining of the world (about 6 thousand years ago 😉 ) and see everything that happens between then and now due to my immorality. But u can forget about that sacrificing myself for the sins of man B.S. u guys are on ur own with that one. Good luck dealing with my dad/me without my help.
Dont know who id choose for the historical person.
^Was going to say John Holmes until I remembered he had a dark last few years, but someone along those lines.
For a fictional character, I'm tempted to go for Sherlock Holmes as he's probably my favourite fictional character of all time, but I've read all the stories so I'm not sure how much fun could be had, Conan is a good shout but I'll opt for Han Solo.