Stephen was a great man of God, and his official job was to ensure that the widows in Jerusalem were cared for. This might seem like a menial job, but it's one of the most direct expressions of love for our Creator that we are capable of.
He wasn't one of the original Twelve Disciples, yet he still had authority and worked miracles. His face even glowed like Moses' did when he came down from spending 40 days with God on Sinai.
Whatever your task in the Kingdom, if it is God-ordained, then it's important and necessary. The foot seems humble, but if you had to go without one, I assure you that you would miss it.
Acts 6