The Essentials, at the MR PORTER web site, has a long visual list of items you should have in your collection of clothing. Even if you don’t buy them from this site (which is not cheap), you should use this page as a guide of what to acquire elsewhere.
My only quibbles are these:
- I would go with a longer length for men’s shorts
- skip the cargo pants
- Introduce colour via accessories
That said, the list is great and well, essential, if you are building up your wardrobe.