Tyler acts the part well but Welling/Routh look the part so it's not perfect imo.
And the Perfect Superman is Shazam
Rosenbaum's Lex is a bigger character on that show than Lois. He's definitely needed. Bringing in Green Arrow would be great as a passing the torch moment. People were furious when Amell was cast instead of a spin off with Hartley. That's all you need. Would've said Chloe if she wasn't a sex criminal.
He'd be playing Hawk anyway
You could get Hartley as Aquaman though. As a callback to the cancelled pilot