I'd argue that Marvel is another example, although a complex one. Marvel Comics has changed very little in terms of culture; Ike Perlmutter runs it very much the way he ran it when it was independent. The Marvel Cinematic Universe has been great for Marvel but is no longer under Marvel Comics proper (it's part of the studio group now).
As long as we're doing Disney acquisitions, Lucasfilm is also still pretty independent and successful. Other Disney acquisitions have been less so.
I’d argue that LucasArts was effectively dead before the acquisition, despite having in theory a few games in development. That said, I’d also argue that LucasArts would have wound up shuttered even if it had been in great shape, so you’re probably right either way.
As long as we're doing Disney acquisitions, Lucasfilm is also still pretty independent and successful. Other Disney acquisitions have been less so.