Opeth is a strange one and I don’t think it really counts. The band was still forming when the current leader of the band joined. Yeah if you’re super technical then the band that formed didn’t include him, but it seems like the “original” group hadn’t even played any showed before Akerfelt joined.

In a bio that Akerfelt wrote he says that basically the band died the day he showed up to a rehearsal and later he and the original founder “reformed” Opeth, so it’s debatable if it’s a ship of thesius situation or a new ship with the same name.