Are any of the current Roshei Yeshivos of YTV considered to be the primary RY, in the same sense that Rav Pam zt”l held that title?
Rav Pam held that title only because of how well known he was in the outside world.
He didn’t have the power that most Roshey Yeshiva have
He needed permission from the board of directors for many decisions. Even for things which he didn’t need the board’s approval the power in the Yeshiva wasn’t exclusively his. He shared it with other hanhala members to a much larger degree than most other Roshey Yeshiva do.
Rav Yitzchok Lichtenstein will probably find himself in the same position.