@ZSK
you would need to define what you mean as a “Gadol”. As per my definition and as per my knowledge:
Was R Elishav zl a gadol? yes
Was R Yosef zl a gadol ? Rav Ovadia – yes
Was R shloma zalman Orbach zl a gadol? yes
Was R isser zalman meltzer zl a gadol? yes
Was R tzvi pesach frank zl a gadol? no
Was the punvitcha rav zl a gadol? no
Were the rizyhna rebas like the Aver Yaakov, Shtefenesht (the skullner and ribntza Reba Reba ), Bohush zl a gadol? of those specified- no
Was R shraga fievel mendelovitch who helped so many yeshivas in the USA a gadol? no
Was R Moshe Wolfson zl a gadol? no
each of these would “yes”‘s would of course only be limited to their specific peer reviewed expertise. each of these “no”‘s might be from my own ignorance of a specific peer-reviewed Torah expertise that they might have had.