Schisandra and Chinese licorice root (G, uralensis) are my favorites. Others include astragalus, Siberian ginseng, suma, ashwagandha, holy basil (tulsi), jiaogulan (Gynostemma), Arctic root (rhodiola), reishi, cordyceps, codonopsis, etc.
Nettle leaf is not considered an adaptogen although it does have supportive effects on the adrenals.