I think you're overrating Draisaitl and RNH here. Draisaitl hasn't shown the ability to be an elite #1 center when not playing with McDavid, it's more fair to say he's an top line winger who can be your #2C in a pinch. RNH isn't a #1C, he's probably an above average 2C.
I really think Oilers fans may fall into a trap of overrating guys who play with McDavid. Sure, if they're not playing with McDavid, their linemates may suck, but there's a massive difference between guys like
Draisaitl and
RNH with McDavid and without McDavid. This isn't just this season either, this is a common trend with both
Draisaitl and
RNH. The easy solution that I see is have RNH and Draisaitl as linemates to make a strong 2nd line, since McDavid can make a turnip effective in the NHL, but RNH and Draisaitl haven't even played 200 minutes together over Draisaitl's career.