Okay; You're allowed to choose however many members you like (within reason) and you must assign them all to a specific role (lead guitarist, bass etc.).
You can choose from any genre although the band must formulate to make metal /rock music. Everyone is entitled to their own opinions so no slating/arguments of choices, only discussion.
Here's my list -
Drums - Robb Reiner
Bass - Steve Harris
Lead Guitar - Daron Malakian
Lead Vocals - Tom Araya
Secondary Guitar - Mark Tremonti
What's yours??