You need a good strong character, someone who is wealthy but not so good on the looks side of things. He needs to be on his third wife, always works that, at least one of the previous wives has gone lesbian, adds a little spice does that. He must have a few kids as well just to weigh him down.
As for a storyline? How about 3rd wife is always shopping whilst he slobs around the house drinking and farting, one day he sees his arse and strangles her. He buries her body in the foundations of an apartment block he is building in the city centre. No one suspects a thing until he blabs off his mush to an online forum full of weirdos, ne'r do wells and drunks. They laugh then shop him to der Dibble ?
What do you reckon ?