4-MARCO THE PHOENIX
Marco is a very strong individual, as he demonstrated in the Marineford War that he was on a similar level of fighting as the three Admirals. He was fully capable of fighting admirals Kizaru, Aokiji, and Akainu while holding his own.
Marco the Tori Tori no Mi, Model: Phoenix, a Mythical Zoan-type Devil Fruit which allows him to transform into a phoenix, granting him the ability to fly.
While this fruit’s power is classified as a Zoan, due to the uniqueness of the phoenix, the additional powers it grants may be considered similar to those of Paramecia (the somewhat “superhuman” power that affects the user’s body: regeneration) and Logia (the generation of light-blue phoenix flames).
The fruit’s greatest attribute, however, is that Marco can recover from any damage he accumulates in his human form by reverting to his phoenix, or hybrid phoenix form, or just by summoning blue flames around his body. These blue flames are not hot and they do not burn or spread like normal fire; instead, they are what allow him to heal, and are referred to as the “Blue Flames of Resurrection”. Furthermore, the healing properties of his blue flames can also be used to treat other beings, albeit to a more limited extent, allowing Marco to act as an efficient doctor.