I'll put up what I have done so far later, and then add to it as I go down the list.
I've just had my invitation to Timeline 3. Impressed on a very brief inspection, and the spreadsheet pane is very helpful. I expect to add it as a core tool to my own workflow. But it is highly complex and unlikely to be worth using for anything simpler.
Also starting to use Mindomo, which is quite complex too, but with good import/export (including xlsx, csv, md, txt). So it seems as if Mindomo, Obsidian and Timeline could be a good combo.
But I'm only just learning how best to use Obsidian in development, and adding another two unfamiliar tools is no way to tackle a current problem so I'll let myself learn slowly and use something simpler for now.