These things are highly subjective but he's easily my favorite 20th century poet. So creative, incredibly deep, yet so accessible. But as these things go, there's always a loss of fidelity in translation, particularly to non-Romance languages.
If anyone wants to tap straight into Pessoa's world with two flawless poems, you can't go wrong with "Tabacaria" (Tobacco Shop — https://www.ronnowpoetry.com/contents/pessoa/TobaccoShop.htm...) and "Poema em Linha Reta" (Poem in a Straight Line — https://thenewloud.tumblr.com/post/11328170683/poem-in-a-str...).
"If only I could eat chocolate / with as much truth as you do!"