what is the best smelling essential oil?

The best smelling essential oil is highly subjective, as it is very much a matter of preference, and what the use of the oil is for.

If the use of the essential oil is topical, you may not want to smell like peppermint and orange when going out, but using a few drops of peppermint oil and orange oil topically is a great way to increase your mood and relieve anxiety.

Some don't really like smelling oils, so they may prefer other, lighter, scented oils.

It really is a matter of how you intend to use the essential oil, what the purpose of the essential oil is, and your preferences in terms of scents.