What was the singer Phil Anselmo most known for?

Phil Anselmo is best known as the lead vocalist of the heavy metal band Pantera, which he joined in 1987. He is known for his distinctive vocal style, which includes both harsh and clean singing, as well as his aggressive stage presence. Anselmo is also a songwriter, guitarist, and producer, and has released several solo albums and collaborated with other artists. He is considered one of the most influential heavy metal vocalists of all time, and Pantera is widely regarded as one of the most successful and influential heavy metal bands of all time.