sechel, as I’ve pointed out a number of times in different threads, you have absolutely no right to say that if Mashiach comes from the dead then it is the L rebbe, as the gemoro says that if Mashiach comes from the dead, then it will be Daniel Ish Chamudos.
That is according to one pshat in Rashi. According to the other pshat, the gemoro is saying that if we want to find someone who is dead to whom a LIVE Mashiach will be similar, then it is Daniel.
There is thus NO room for someone to suggest another candidate who is dead. And, by the way, there is no other pshat given in the gemoro other than those two pshotim given by Rashi.