First things first, series spoiler alert for KH through DDD. (I think he tries to announce roughly which game he's focusing on if you only want to watch part but still, warning is there now)

https://www.youtube.com/watch?v=99hSFcl5LK4

That video there is one I saw awhile back. All told, the guy does a good job keeping the timeline organized. (And if I recall correctly, he points out some discrepancies with it too)

Seeing as how there's seven games in the series, it may prove useful to have a refresher on the story in 20 minutes so players don't have to go through them all at once. (~50hours a game x 7 = ~350hours to get the full story, I think it may be a bit useful...)

Oh, game order, story-wise: [Birth by Sleep] [KH1] [358/2 first half] [Chain of Memories] [358/2 second half] [KH2] [Re: Coded] [Dream Drop Distance]

All other games are remakes, remasters, etc. of whatever they're named after. To my knowledge, there aren't any important scenes missing from the non-remastered versions, at least concerning the overarching story.

The upcoming Aqua-playable game releasing on the 2.8 disc is... unknown to me (I may simply be forgetting it) on the timeline, but I presume it to be before [KH3].