Quince is able to hybridize with apples and pears. https://cornusmas.eu/catalogue/intergeneric-hybrids https://cornusmas.eu/catalogue/intergeneric-hybrids has

Quince is able to hybridize with apples and pears. https://cornusmas.eu/catalogue/intergeneric-hybrids https://cornusmas.eu/catalogue/intergeneric-hybrids has some information about some interesting mixes (and he sends out great plants if you are in Europe). Palms also form fascinating hybrids and there is an active community of people around the world doing this and sharing information.