For irons, you can get a lot of mileage from simple flattened cube and some carefully manipulated subsurf. Cut loops to shape the edges, not so close that they are square (this depends, right? the top line on a Ping is squarer than most other brands). Once you have the edge shape you like, shape the face to match the face of the club — flat on the bottom so just bring one side down. The bottom edge will be wider so you might make a few cuts and shape with a Lattice modifier. You will have to think about how you will create the hozel before you tilt the face of the club into its appropriate angle.
It was a lot easier in the old days when all you could get were forged blades. Now most clubs are exotic cavity back or hybrids with offset hozels. One thing that hasn’t changed too much is the classic sand wedge — they are typically a blade style with a substantial angle.
It is an interesting modeling challenge. Good luck.