Here's a list of feats, if I am wrong please post someone with better feats. (Besides Roger reaching raftel of course) although akainu hasn't tried.
OK heres his feats
Feat 1: became admiral
2: became fleet admiral
3: fought for 10 days an nights against kuzan, beat him, then let him live cause they were friends
4: prevented whitebeard from destroying hq
5: while not being able to go all out due to teammates and protecting hq and the Plat form, also before the two year time skip he did more damage to whitebeard and contributed the most to his death than anyone else
6: tanked two direct haki enhanced gura punches and still continued fighting with others
7: received no damage from any haki or any other attacks at all in marine ford except by whitebeard
8: oda said if luffy had akainu strength he would find one piece within a hear and now akainu has had two years to grow
9: stalemated whitebeard gura punch with lava fist
10: the only character to ever destroy luffys will 100%
11: killed ace
12: made blackbeard run which garp and sengoku together couldn't do
There's even more but going by the feats I posted there's no one in one piece with enough fire power to stop akainu. If two direct gura punches couldn't do it, no one else in all of one piece is gonna be able to knock him unconscious or stop him from moving forward, whitebeard's gura punches are the strongest attacks ever shown in one piece still to this date, the only chance of beating him is to team up against him, and no one is overpowering his attacks if whitebeard couldnt. No one has ever been stated or shown to be able to fight as long as him neither. Cracker was almost unable to stand after just 11 hours, not even 1 day.
OK heres his feats
Feat 1: became admiral
2: became fleet admiral
3: fought for 10 days an nights against kuzan, beat him, then let him live cause they were friends
4: prevented whitebeard from destroying hq
5: while not being able to go all out due to teammates and protecting hq and the Plat form, also before the two year time skip he did more damage to whitebeard and contributed the most to his death than anyone else
6: tanked two direct haki enhanced gura punches and still continued fighting with others
7: received no damage from any haki or any other attacks at all in marine ford except by whitebeard
8: oda said if luffy had akainu strength he would find one piece within a hear and now akainu has had two years to grow
9: stalemated whitebeard gura punch with lava fist
10: the only character to ever destroy luffys will 100%
11: killed ace
12: made blackbeard run which garp and sengoku together couldn't do
There's even more but going by the feats I posted there's no one in one piece with enough fire power to stop akainu. If two direct gura punches couldn't do it, no one else in all of one piece is gonna be able to knock him unconscious or stop him from moving forward, whitebeard's gura punches are the strongest attacks ever shown in one piece still to this date, the only chance of beating him is to team up against him, and no one is overpowering his attacks if whitebeard couldnt. No one has ever been stated or shown to be able to fight as long as him neither. Cracker was almost unable to stand after just 11 hours, not even 1 day.