Actually you can lessen the lean. It's not easy though. The tail rotor axis would have to be moved up like you said S Mcflurry, but the T/R would also have to be angled. They use this method on larger helis to keep them level in a hover. Of course all these dimensions are calculated. On an RC heli you'd probably have to use trial and error.

The Black Hawk is a good example of the tail set-up I'm talking about. Notice it's relationship to the main rotor plane as well as the angle of the T/R.