You're right, Klopp has already burnt his bridges when he said that hed never manage a club like Barcelona, Real Madrid, Bayern Munich, PSG or Manchester United (who he already turned down).
Hes not interested in clubs that can just buy anyone they want, hes much more about team bonding and improving/developing young players.
He also loves clubs where the club has a real connection with the fans and I think Klopp and Liverpool are a perfect fit. I cant see him going anywhere soon.