okay so there are two ways to split it but to keep it closest:
Benedick - Thor, Don Pedro - Odin, Don John-Loki, Claudio-Balder
Beatrice - Sif, Hero - Nanna, Leonato - Heimdall
futzing relationships in several places but same end couples
some things shift in the last half due to loyalties and personalities but it all mostly ends the same.
(namely Sif would ask Thor to /support/ her going after Balder not to go after him for her)
basically it would be a big excuse for sassy Sif and for young egotistic Thor being sassy babies