The vast majority of modern scholars would not dispute this. When we look carefully at that statement we see there are two conclusions one may draw. The first is that all elders rule. The second is that within the ruling eldership are some who also preach and teach as their main ministry. The natural reading of Paul's comment suggests that there are two separate ministries which elders fulfil.
All elders rule, but some elders also teach and preach.
There are no grounds for suggesting that ruling elders should never preach or teach. But it is possible to infer that there are some elders who need to be supported by the church to give themselves mainly to the ministry of preaching and teaching. The apostle is addressing the need for the church to set aside some of its elders to give themselves to labour in this teaching ministry alone. That is to be their main contribution to the church's life. This equality within the eldership is such a fundamental principal in my view that I am not entirely happy to make a distinction between ministers and elders.