During his time as the Number One Hero, All Might fought All For One twice and managed to defeat him during both encounters. Without a doubt, he's far stronger than Izuku Midoriya.
Rimuru could easily defeat Deku and even take his precious One for All, too. If some of Rimuru's powers don't make sense to you, that may be because you haven't read the Tensei Slime light novels.
Dabi can produce the hottest flames in the entire series, so Deku cannot allow himself to get burnt into a crisp. But what doesn't help is that Dabi's fire can also spread very quickly. However, the sickly villain doesn't have much durability.
midoriya is beyond weak compared to luffy and who luffy has fought and beaten. He wouldn't be able to hurt luffy he would just break his own bones and then take a light smack and be out for awhile. Midoriya is deku right? He would get stomped by luffy in his base form.
Boruto can use Shadow Clone Jutsu and Rasengan, powers his father worked very hard to learn. He can also summon the giant snake, Garaga, with his Summoning Jutsu. But it is very unlikely for Boruto to win against Deku. Deku can easily evade his Rasengan and even a single punch will be enough to knock him down.
Goku's power level at the first rank of Super Saiyan blows Deku's cowling away already granting Goku about 5o times his base power and with no real risk to Goku's body.
Deku can basically do anything that Bakugo can do. Of course, the real difference-maker lies in the OFA Quirk. Bakugo simply cannot match that attacking power. It will be a very close fight, but Deku will likely prevail in the end.
Muzan wins with Mid-High Difficulty. Muzans strength: Quick Regeneration , Has Shapeshifting, Blood Demon Art and can poison people and can possess people with his blood and can absorb people , also has Supernatural Physical prowess and Mental Prowess and his whips which can give him range.
We've seen Deku and Todoroki go up against each other once already, and it didn't go well for the former. He ended up getting knocked off the ring and unconscious. Yes, Deku did seem more focused on getting Todoroki to use all of his quirk's power but it doesn't change the fact that Todoroki won the fight.
1 BEAT: Joker
That being said, while the Joker can often cause issues with his whacky capers, he wouldn't last long in a straight-up fistfight against Deku.
To sum it up, Midoriya cannot use 100 percent of One For All without the help of Eri since it would put his body at risk. The consequences can be so bad that it could lead to his death if he uses it without training his body until it can handle it.
Along with the power that All Might passed down to him, Midoriya has also attained some incredible abilities. With time, his powers have only grown, and currently, he's strong enough to hold his own against some of the very strongest people in the entire series with his many abilities.
One for All is the most legendary quirk of My Hero Academia, and Deku inherited it from All Might. However, it was initially used by Yoichi Shigaraki, the series' first host, from whom it was passed down to his successors. It is an extremely strong quirk and can store a staggering amount of raw power.
Fans know that his name is Hisashi Midoriya and that his quirk is fire breathing. It's assumed that Hishashi's fire-breathing quirk isn't as eye-catching as Dabi's flames since Inko brushed it off at Izuku's doctor's appointment as a child. Currently, Hisashi's work has taken him abroad, leaving Inko and Izuku alone.
Tanjiro would win, because Deku have no way of killing Tanjiro. Deku may be stronger but in the end Tanjiro would win by stamina or landing a hit at Deku, which have poison that would kill Deku.
Midoriya may possess the strongest quirk in all of My Hero Academia, but even that power is not enough to defeat a literal god, which is why he has absolutely no chance of defeating Arceus in a one-on-one fight.
Edgeshot used his Quirk to save Bakugo after he was left in a near-death state by Shigaraki Tomura. However, a look at his Quirk is enough to tell the fans that it should not have been able to save the young Hero aspirant from dying.
Deku's final quirk is known as 'gearshift'. It's a quirk that is activated via physical contact. It allows the user to change the velocity of anything they touch, meaning they can spontaneously slow things down, or speed things up.
However, many My Hero Academia fans might be curious to see why Bakugo bullies Deku as often as he does. The main reason is related to an inferiority complex. Midoriya was Quirkless, yet he eventually got a Quirk from All Might, a person that Bakugo idolized.
Izuku always gives it his all during battle, but he doesn't always win. Even when he does, he often needs help to get the job done.
1 LOSE AGAINST: Superman
In all likelihood, a fight between Deku and Superman would be over almost before it has even started, with Superman ending the fight in the blink of an eye.
With Smokescreen, Danger Sense, Float and Blackwhip, Deku is able to completely reduce visibility around him to zero, while still retaining the perfect idea of his victim's location and more than enough means to reach them instantly.