There is quite a few smaller publishers that do a lot of licensed comics - Boom Studios, Dynamite (not that I’d want them to get Doctor Who, but still), Image to a lesser extent. I don’t think they would handle Doctor Who as good as Titan did at its best (maybe Boom), but like I said I prefer something to nothing. And with the exception of their latest comic, I think their output have become lazy (Missy, Fugitive, Empire of the Wolf).
Honestly I think the true challenge is that most publishers will see it as an european title with a British reader base and dismiss it as not worth it.
The events like Doom’s Day and Timelord Victorious which spanned across a multitude of different medias from comics, to books, to audiobooks, to audiodramas etc!