Whenever I'm asked what my favorite salvia is, I have to say leucantha/ Mexican Bush Sage...but there are two close runners. I love salvia 'Waverly' for its frilly delicacy..in full sun it's stockier, more solid...but in part shade it's more 'wispy' and I love that look.
And salvia 'Hot Lips'......it's so troublefree and vigorous. This is one plant and it's 5-6 ft across and 4 ft high....