Great-grandparent's half-sibling.
half-great-great-pibling.
Great-grandparent's first cousin.
My great-great-cousin-pibling is a good person.
Grandparent’s half-first cousin.
My half-first great-cousin-pibling is a good person.
My pibling-by-marriage-in-law is a good person.
1. The spouse of one's grandparent's sibling.
2. The sibling of one's grandparent-in-law.
My great-pibling-in-law is a good person.