It is one of the zenith jobs in all of musical show: Wotan, lord of the divine beings in Wagner's epic "Ring." It's an almost fathomless part that requests a wonderful voice, control, unpretentious acting, sharp insight and stamina. Incredible Wotans don't actually develop on trees. At the Metropolitan Musical show, the German baritone Michael Volle has wore an eye fix and got a lance to sing his initially complete "Ring" cycle (exhibitions proceed through May 11). Here, three of The New York Times' established music scholars — Michael Cooper, a journalist, Joshua Barone, a ranking staff manager and faultfinder, and Seth Colter Dividers, a commentator — examine his astounding execution up until now. MICHAEL COOPER I was struck by how Mr. Volle explored a chilling minute in "Bite the dust Walküre," the second "Ring" musical show. Wotan has quite recently reluctantly caused the passing of his own child by interceding in a n