i've given you at least half a dozen serious suggestions in our many interactions on this issue, but i'm afraid that the mist decends whenever theres any suggestion of either falability or mortality on the part of the Great One and you become incapable of reading words and just rant off about Blairites.
(and actually, i'm being serious about the 'who could be worse?' thing - Abbott has no redeeming features whatsoever and makes Corbyn look popular, but McDonnell does have redeeming features. he has baggage certainly, and his winning friends and influencing people skills could do with a polish, but no one has ever described him as thick or lazy, he can cope with the rough stuff, and he can think on his feet. he wouldn't be my choice of leader for a number of reasons, but i think he'd certainly be an above averagely competant cabinet-level minister.)
seriously, look at the polling, there is no demographic that thinks Corbyn would be a better PM than May, and only one - BAME - that is more likely to vote Labour than Tory. the 19% lead we have seen before - if rarely - what we've never seen before is the collapse in support for Labour amongst its key working class demographics.