After Rogue One I'm in a bit of a SW kick but apart from The Son if Suns trilogy I'm not very familiar with the fandom.

Could anyone recommend a decent AU where Anakin doesn't turn to the dark side?

 

Assorted works of geo3

The trilogy he wrote isn't exactly non dark...but Ani doesn't go murdering younglings either. Fortune's Gate is a rather interesting take on an AU of Anakin being turned away by the order.

 

There's a couple of decent time travel Peggy Sue type stories, though the better ones tend to be Obi-wan focused if you'd be interested in those. I'll dig up the links and edit at some point.

EDIT:
Just a quick warning, haven't read some of these through in a while so can't say how they hold up, but:

Reprise series:
Obi-wan travels back in time, but he doesn't "wake up" in his younger body - he stays in his older one. Probably doesn't quite fit into what you're looking for, since the majority of it has Anakin still as a child (9/10ish). Can't say I remember how much angst/filler there is, but it's decent enough. The series is not finished, but given they've written something like 250k words in a year, I don't think there's that much to worry about. Cool premise at least.

Coalesced Matter:
Story about Dooku interacting with Obi-wan and Anakin on a mission. Not overtly AU as it takes place before AotC. The author(s) have written a couple of other good AU fics, might be worth giving those a try if you like their style of writing. Sometimes a bit too angst-y/introspective (they seem to love talking about psychology).

There's a couple more, but I forgot to bookmark them so I'll have a search later.

 

Yoda's Shadow is a half-decent Peggy Sue though it has time-travelling repentant Anakin in it.