I think a rustic Windsor bench would be in order. A couple butterflies across the crack. Get a bit more elm, make a back with spindles, turned legs, stretchers, a little sculpting of the seat and you have it.
I like the sound of the bench inspector mentioned.
My brother gave me 3 slabs of oak, been sitting in the shed for over a year.
Very heavy and have to move them all the time.
Only have an old beckum bandsaw so do not think it will cope cutting
them in half. its like cutting a brick with a hand saw...lol
I thought butterflies too, if your splitting off the whole half I wonder how the split would sit if placed back together? I recently joined a couple of sawn bits, biscuits and glue but I then ran the router along the joint which was a little rough and laid in a contrasting strip finished off with a couple of butterflies,,could a curved bit be let in in the same way,,,maybe by useing a template? Resin,,,blue or otherwise doesn't do it for me,,,but maybe the same could be said about butterflies too,,,