Would you give up your ability to swim for wondrous powers, keeping in mind you will have a lifestyle surrounded by water? Devil Fruits Users made there choice and were gifted with a rare ability that no one has. But witch user has the most powerful devil power. Here we have the "Top 10 Devil Fruits Users." You can voice your opinion here.
The unparalleled and greatest pirate and reach status as the Pirate King is Gol D. Roger. He assembled a crew that ruled the pirate world and knew the world whole. No other pirate or Marine could stand up to him. Gol's rivals Monkey D. Garp and Whitebread both acknowledged him as the strongest. Gol's first mate Silvers Rayleigh is a testament to his strength as he has been acknowledge even in his old age as a force unlike any other. Rayleigh in his old age is able to contend with the current generation in power, so Gol must have been a even bigger treat. Rayleigh is quoted for saying Gol could "hear the voice of all things" and this is a hint to his devil fruit ability. This sounds like a weak ability but to hear things means you can also comunicate with them. Gold could have been able to comunicate with anything and also control or command them to do anything. Gol could have been able to command anything to do what he wanted. Gol could have had a devil fruit that gave him dominance over anything. This is my theory but there is no doubt that Gol had a devil fruit and that it was used to make him the most powerful Devil Fruit User.