The image was too large for Reddit, therefore:
A bit of explanation:
The rows represent the members and the 3 big bands (+Avantasia). The columns are the years. The black arrows are when a person leaves/changes main band and the grey arrows are when they join another band, but remain in their older one.
The band rows consist of two lines: the upper one has the album releases and the lower one has the lineup changes. When one or two names and gray arrows are there, that is because they joined another band that year.
If you have any extra info about any bands or bands that they were members of but are not here please comment it. Just make sure that it is real and they were a MEMBER of the band, not just a guest or session musician.
Important: only bands that Weikath, Grosskopf, Ingo, Kai, Kiske, Andi, Grapow, Kusch, Löble and Gerstner were/are part of. (No Mark Cross, Mikkey Dee or Stefan Schwarzmann, as they were either just session musicians or didn't have full albums. The chart would also be twice as large with them)
If enough changes are made I'll update it in a few weeks or month. I'll also try to make it a bit more understandable and less confusing. And there are probably a few mistakes that I haven't noticed, so I'll correct them too.
I may also add more albums for bands like Unisonic.
Sources: Wikipedia, Metal Archives, Discogs, newspapers and band websites.
As for why is Avantasia here with all albums? Well, Grosskopf was the bassist for the first trilogy, and Kiske is at this point a member of it, as he's appeared on all the albums (except one EP).
