There are two approaches: You can either try to change him or change yourself. It is not life threatening for his clothes to lie around the house. I know you’re organized and that it hurts you when things are not in their place. However, you can work on yourself in accepting a little more messiness.
The other approach is to say to him, “I think I’m being a good wife to you. If I’m not, I certainly want you to give me ideas on how I can be a better wife to you. One thing that would really help me would be…” Then you tell him specifically what you would like for him to do. I’m not saying he’ll do it but when you express the desire to be a better wife, it gives him hope that things might get better on your side and he might be willing to give more on his side.