"Frozen"
Only warlord with a higher frozen bounty is potentially Mihawk.
Meaning Weevil is the second strongest warlord.
Bounty is and has always been an atrocious argument anyway. According to bounties:
Child Big Mom (500m) is about ten times stronger than Rox Kaido (70m)
Buggy is currently stronger than Luffy
Kid and Law are just as strong as Luffy
Law and Kid are three times stronger than Zoro
Crocodile is twice as strong as Katakuri
Hancock is stronger than King
Bounties are just straight nonsense in terms of strength level and at this point only desperate copelords push bounty as a serious argument.