#2 Stone Cold Steve Austin
You know that a WWE Superstar is going to be remembered for their promos when it was indeed a promo that rose them to superstardom. Stone Cold Steve Austin wasn't having the greatest of times in the company but a change in persona followed by winning the King of the Ring transformed his WWE career.
Austin beat Jake "The Snake" Roberts in the final of the KOTR tournament in 1996 and during his acceptance speech, he decided to take a jibe at the religious nature of the latter's character at the time. A bit of wordplay resulted in a spin-off of the Bible verse John 3:16 and thus, Austin 3:16 was born.
Stone Cold went on to have several world title runs post that and multiple feuds with other megastars, such as The Rock. While that rivalry most certainly had a huge role in shaping WWE's Attitude Era, promos had a huge role in elevating, rather carving Stone Cold's career. And that's the bottom line because Stone Cold said so!