I was 100% sure about the list above obtained from NAFEX. I researched them extensively. Nothing beats your experience either! Tyson is compatible “ Tyson won the same rave reviews. Discovered growing in a hedgerow in 1794 on land belonging to Jonathan Tyson of Jenkintown, Pa., it became a major pear cultivar in its day.
U.P. Hedrick, who wrote The Pears of New York, the quintessential book on pears, wrote in 1921 that “Tyson is the best pear of its season for the home orchard” and “No other variety offers so many good starting points for the pear-breeder.”
Though not as large or pretty as its rival, Bartlett, Tyson pears are extra-juicy, sweet and aromatic—and they grow on ultra-hardy trees.”-http://www.hobbyfarms.com/heirloom-pears-3/
Magness is on the list above as are Concorde which is a cross of Doyenné du Comice x Conférence. Conference was a seedling “The female parent is Leon Leclerc de Laval, the male parent is unknown. First discovered 1884, it was taken forward by T. Francis Rivers of the Rivers Nursery of Sawbridgeworth which sadly went out of business many decades ago. The variety was formally named Conference in 1895 at the British Pear Conference” - https://www.gardenfocused.co.uk/fruitarticles/pears/variety-conference.php
Doyenné du Comice is an interesting and well known pear! “The parents are not known for this variety. It was bred in France at the Garden of Comice Horticole in Angers in the 1840s. Soon after it was introduced to England. “- https://www.gardenfocused.co.uk/fruitarticles/pears/variety-doyenne-du-comice.php
Magness like it’s parent Comice is quince compatible. Magness is a cross of “Seckel x Comice. This pear was released by the USDA in 1968 as a very high quality dessert pear that will survive under heavy fireblight pressure. Sometimes tardy to start bearing, but the fruit quality makes up for the light early cropping (branch-spreading will significantly help). Tardy cropping is much less a problem on the OHxF stocks. Mature trees are productive if good pollination is provided. Excellent keeper. Tree is vigorous and spreading.
Magness does not produce good pollen for any other cultivar.”- https://shop.cumminsnursery.com/shop/pear-trees/magness
No one really knows the parents of seckle “It is believed that Seckel pears were discovered growing as a wild sapling in an orchard outside of Philadelphia in the early 1800s. Though there are some that argue that Seckel pears grew from seeds left by German immigrants travelling west. Today, Seckel pears can be found growing in the US Pacific Northwest.”-http://www.specialtyproduce.com/produce/Seckel_Pears_6582.php