There are several acts named Skullcrusher.
1) Old School Death Metal band from Antwerp; Belgium. Formed in 2010.
Guitar - Den Giant
Bass - Marco
Drums - Jordi
Grunts - Den Beir
2) Black / Thrash Metal band from Finland formed in 1997. This band recorded four demos before dissolving.
3) LA-based songwriter Helen Ballentine, who released her debut single "Places/Plans" on Secretly Canadian in 2020.