In the OT Anakin isn’t referred to by his first name until ROTJ.

So if you removed references to 'Skywalker’ from the script, Anakin could still become Vader but not be exposed as the father of Luke, if you set up an alternative pupil for Obi-wan and somehow linked him to a woman who gets pregnant. This chap could already be Obi-Wan’s pupil :

when this chap comes on the scene:

and not be too happy about it(for example)

Maybe Anakin attacks Padme because of more traditional jealousy, though I still favour Force lightning to choking.

I always saw Vader choke fetish as an externalisation of his own inability to breath unaided.

If he attacked his wife with Sith lightning it would explain why he never did it again (that and the danger to his own electronics) and it would add weight to Vader seeing Luke attacked that way by the Emperor (a lot more than "No Nooooooooooooooooo!).

The surprises of later episodes should not be blown by the earlier ones.

Episodes 1 to 3 should be earlier episodes not true prequels as such.