Cantor Mosh Kossouvitzky was the Chazan there at one time. Now I think it’s Chazzan Miller, a Bobover Chasid. On Shabbos Mevorchim the place is packed with Chassidim to hear the chazzan bentch Rosh Chodesh.
In the 1980’s Temple Beth El and Young Israel of Borough Park merged and it became Young Israel Beth El. I’m not sure what the status is at this point.