Who is the earliest theologian arguing for a 'memorial ordinance' theory of the Eucharist as opposed to a 'real presence sacramental' one?

The Catholic, Orthodox, and some Protestant denominations hold to an idea of the 'real presence' when it comes to the Eucharist. Catholics understand this in terms of 'transubstantiation', Orthodox prefer to describe what is happening more as simply a mystery, and Protestant denominations have varying views. Yet, significant Protestant denominations do not hold to the idea of the 'real presence', and instead understand the Eucharist ('the Lord's Supper') as being an ordinance that is memorial (remembering what Jesus did, also known as 'memorialism'). For example , > The American Baptist Churches USA, a mainline Baptist denomination, > believes that "The bread and cup that symbolize the broken body and > shed blood offered by Christ remind us today of God's great love for > us" Who was the earliest theologian to articulate and argue for this kind of memorial ordinance view of the Eucharist?