Let my try to post an objective and non-controversial answer to tickle toe eitus’ question.
Rav Abadi is an Israeli born Posek, probably in his 80’s. He was the official Posek of the Lakewood Yeshiva under Rav Aharon zatzal, but left that position shortly after Rav Shneur became the Rosh Yeshiva.
He known for his brilliant and original reasoning, as well as for his independent positions. His rulings are often in conflict with the vast majority of other Poskim and accepted practice.