What bands do YOU consider the First Wave of Black Metal?

Venom did create black metal they are the first
mercyful fate is was started in 81 so they were the second in the black metal wave and then bathory in 83. Bathory is also one of the pioneers of viking metal.
 
Mayhem is definitely first wave. And one of the prominent reasons why the second wave happened.
 
and Mayhem basically started the norwegian black metal wave, introduced it to Varg who introduced it to Emperor.
 
Mayhem was part of both waves. But yeah Darkthrone is entirely second wave. The best of the second wave, at that.