King: 1.5 billion (not any higher as that would make the gap between him and Queen larger than Jack and Queen, or 1.33 if Oda really wants to highlight his rivalry with Queen and their closeness in strength and notoriety)
Marco: 1.6-8 billion (Teach beat him to truly prove that he's the new Emperor)
Benn Beckmann: 1.8-1.9
Lucky Roo: 1-1.3 billion
Yasopp: 800 million
Mihawk: 2 billion (strongest ex-Warlord and World's Strongest Swordsman but doesn't have a crew or much influence alone, may increase if he allies with Shanks)
Aokiji: 3 billion (ex-Admiral, allied with a Yonko)
Weevil: 500-800 million
Boa: 500-600 million
Buggy: 500 million-1 billion (depending on how much it's inflated due to his past, may increase if he allies with Shanks)