<Ul> <Li> black metal </Li> <Li> death metal </Li> <Li> doom metal </Li> <Li> thrash metal </Li> </Ul> <Li> traditional heavy metal (complete list) </Li> <Tr> <Th_colspan="2"> Fusion genres </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> Alternative metal (funk metal </Li> <Li> nu metal </Li> <Li> rap metal) </Li> <Li> crust punk </Li> <Li> drone metal </Li> <Li> folk metal </Li> <Li> gothic metal </Li> <Li> grindcore </Li> <Li> industrial metal </Li> <Li> metalcore </Li> <Li> neoclassical metal </Li> <Li> post-metal </Li> <Li> progressive metal </Li> <Li> sludge metal </Li> <Li> stoner rock </Li> </Ul> </Td> </Tr>

Who is considered the first heavy metal band