Which psychoanalyst(s) developed the concept of oral pleasure as being the base of attachment between an infant and a mother?

Erik Erikson, a prominent developmental psychologist, is known for his psychosocial theory of human development, which focuses on the impact of social experiences across the lifespan. While Erikson's stages of psychosocial development touch on attachment and relationships, the specific concept of oral pleasure as the basis of attachment was not his primary focus.

Margaret and Harry Harlow were psychologists known for their studies on attachment and social behavior in rhesus monkeys. Their research focused on the importance of contact comfort and the role of attachment figures in social development, rather than specifically on the concept of oral pleasure as the basis of attachment between infants and mothers.

John Bowlby, a British psychologist and psychiatrist, is renowned for his work on attachment theory, emphasizing the significance of secure attachments in early childhood for emotional development. While Bowlby's research delves into the nature of attachment relationships, the specific concept of oral pleasure as the base of attachment is attributed to Sigmund Freud.