Honestly if you are dead set on lifting raw and non-drug tested and want deep competition and "classic" lifting or whatever that means, look into RUM (only once per year - it's its own sanction and pulls lifters from all feds) or any type of "expo" meet like the Olympia, Fit Expo. The USPA runs alot of these and they're very similar to the old USPF and typically offer cash prizes and pull good lifters.
Competition is a skewed word. You can go to a "world" meet that has 500 lifters, but you may only lift against 6-7 guys in M1. Half these guys probably hit a meager total. There aren't many raw world level meets that aren't drug tested that pull lifters from all over the globe and have a deep roster. Your best bet is to go to a Raw Pro Am or the above raw meets where there are typically invites, and thus, a more prestigious meet.