Who is the best known figure amongst the following for
articulating the concept of ‘Negritude’?

The correct option is Aime Cesaire.

Négritude is a literary and ideological philosophy developed in the 1930s by Francophone African and Caribbean writers, intellectuals, and politicians living in Paris. The term was coined and first used in print by the Martinican poet and politician Aimé Césaire in the third issue of the journal L'Étudiant Noir (1935).
Aimé Césaire, along with Leopold Sédar Senghor and Léon-Gontran Damas, developed this concept as a protest against French colonial rule and the policy of assimilation. It represents an assertion of black cultural identity, pride in African heritage, and a rejection of Western cultural hegemony.

To understand why the other options are incorrect:
- Edward Said is famous for his work on Orientalism and postcolonial theory, not Négritude.
- William Jones was an 18th-century philologist known for proposing the relationship between Indo-European languages.
- Anna Rutherford was a noted scholar in the field of postcolonial literature and founder of the journal Kunapipi, but was not a developer of the Négritude movement.