I would keep it basically the same. But have his turn to the darkside not be about learn the dark side to save Padme. Would require a total rewrite of the prequels. He would be a moisture farmer on Tatooine who gives up his farming to join Obi Wan on a damn fool idealistic crusade joining the Clone Wars. Obi Wan recruits him sensing a he has a gift for the force. Obi Wan is a general in the republic. The Enemy is clone masters and Mandalorians not Jango Clones fighting trade federation. Anakin is a great starpilot and a cunning warrior, and a good friend. He is slowly seduced to evil and a descent into madness. There is no Qui-Gon, we see Vader in the suit destroying the Jedi Temple but we aren’t sure who he is. Obi Wan thinks he killed him over the volcano they dueled over.

I’d keep Padme basically the same but have her actually be a character with something to do in II and III. She would help surviving Jedi escape the Purge, be a senator and one of the founding members of the rebel alliance. She does this in secret because she knows Anakin sees it as treason and a betrayal of his mentor the President of the Republic former Senator Palpatine.

She’s doesn’t die til later on Alderaan when Leia is very young. She is one of Queen Breha’s handmaidens to be close to Leia until she dies somehow?