Let's not pretend that whoever the Minority Leader is wouldn't be turned into some crazed, psychotic character that doesn't exist by Republicans. The people in mentioned in this thread would be easily demonized.
Lujan and Castro are Hispanic. Enough said.
Tim Ryan represents a decaying town and would be labeled as a liberal who believes in policies that destroyed manufacturing and coal in the Midwest. Plus, he represents Youngstown, which has a high black population.
With that said, none of these special elections would have turned out differently with another Minority Leader. Even if Pelosi is thrown out, Republicans can still talk about her anyway.
Then how come being compared to Paul Ryan or Mitch McConnell doesn't hurt Republicans? Someone like Tim Ryan would be far harder for Republicans to attack. Pelosi is purely a walking caricature of exactly the type of image that Democrats need to move away from.