good point but they re both invulnerable, so something would have to be forceful enough to get past thier invulnerbalitly to hurt them in the first place and there isnt a whole lot of things that can so i am not sure i can say that they count.
S.D on the other hand is not that invulnerable though he's arguably in the same STR Range. Seeing as how he spars w/superman from time to time. And as long as his head is in tact he can grow back any limb or heal from any wound
Tribunal shouldn't be considered, because he is potentially the most powerful in any respect, as long as The One Above All gives him the order. Being 'killed' and coming back to life isn't a healing factor, it's immortality.
Hulk has one of the best healing factors, and then there are people just well known for their healing abilities, i.e. Wolverine and Deadpool(back before issue 5)
we cant count Galactus types...they dont even really exist in the physical realm of reality...what we see is simply a manifestation....thats why Invisible woman has shoved a force field right through Galactus' chest...he then explained that he cannot be harmed in that manner and then continued to mentally rape each version of her across the multiverse
the character Nitro would be the most durable HUMANOID type character...at one point he was totally indestructable...but he has been drastically downgraded....right now i would say Thanos has the greatest healing ability of anyone who exist solely in the physical realm...Hulk is up there...and so r the heralds of galactus and Greek gods