Other than Seckle which seems universally loved, the ones I settled down to try out and graft past few years are:
Citron de Carmes
Tyson (I basically live in Jenkintown so thought it would be cool to try since it originates there)
Other pears I may have grafted after reading descriptions on USDA site but not sure of their quality (some I may have picked just to get an early pear at my friends land in Upper State NY if they are early) and not sure which ones took yet:
Hudar, Ubileen's Gift, Aurora, Stacy, Wilder Early, Emcianka, Summer Blood, Bloodgood.