Lots of places. Fact is, basically anywhere that sees massive wealth growth over the next half-century will see the rise of unscrupulous billionaires who need reputation-laundering. In most of those places, the capitalism that will see that income growth will also be brutal, barely regulated, uneven and often violent - much like 19th-century European and American capitalism when our societies were at that stage. In some cases, that will mean the governments involved will seek to sportswash their image (Visit Rwanda, for instance), and in others, billionaires will escape their countries and become real estate hoarders in the UK while buying clubs to launder their image.
So, take your pick. African billionaires and regimes, would be my bet - along with Indian billionaires, since Venky's were utterly small fry in comparison to some of their billionaires now (Adani, Ambani et al). The demand won't end, imo. Possibly Chinese billionaires again, post-Xi if the next chairman reverses some of the domestic curbs and reforms he's made.
I agree with you that London clubs will miss the train, though - at least, us, Arsenal and probably Spam. Brentford, Palace and the like might still be bought out, but we're probably brick out of luck with this lot we have clinging on.
Still, even if they sell to another lot just like them, it will be change, at least - and maybe the next lot will hire a better chairman with more of an understanding of on-pitch footballing growth? Who knows.