You want to roll off your bass around 150hz (wherever it sounds good), but actual EQ setting for the vocals depends on how loud they were recorded, the mic, the tone of the vocal, THE MUSIC (how you mixed it), many factors.
If the music is very thick and bassy, and your vocals are thin and recorded at a low level, your EQ settings are going to be entirely different from a loud vocal with a thin song. There are no EQ settings for vocals that work with everything.
Many times a vocal fix comes when an EQ change is made in the music.