The Rose
The Rose was a crime lord known for the purple leather mask he wore to protect his identity. In reality, he was Richard Fisk, the son or Wilson Fisk, the Kingpin of Crime. Richard hated his father's mob ties, and tried unsuccessfully in the past to drive the Kingpin from the mob.
As the Rose, Richard worked for the Kingpin, but secretly worked from the inside to bring the Kingpin down. After a particularly disasterous mob war, a defated Richard gave up his identity of the Rose and pledged to stay loyal to the Kingpin. Which he did, until Richard tried to have the Kingpin assassinated and was killed by him mother in retaliation.
Other people have taken the identity of the Rose, including police Sergeant Blume and former reporter Jacob Conover. All have met with failure like Richard did.