It is true that the Bible does not clearly say that God's people will hear the voice of God in their heads or get impressions, etc. Nor does it say that they won't.
Nevertheless, if I were persuaded that God does not speak outside of scripture, I would have to conclude that those who claim such experiences were either liars or fools. I would not expect such people to be mature Christians filled with the fruit of the Spirit. Furthermore, I would expect their ministries to produce more liars and fools.
Indeed, Jesus said that we should judge a tree by its fruit. It is true that those who are in error about hearing from God will produce bad fruit, while those who are correct will product good fruit.
So, what is the testimony of history? Are there godly people of the past who claimed to hear from God in extraordinary ways?
Yes, there are a multitude, including Presbyterians such as George Wishart (1513-1546) “Wishart was not only singularly learned as well in godly knowledge as in all honest humane science, but also he was so clearly illuminated with the spirit of prophecy, that he saw not only things pertaining to himself, but also such things as some towns, and the whole realm afterward felt, which he forespake, not in secret, but in the audience of many…” [John Knox, History of the Reformation, vol. 1, ed. William Croft Dickinson (New York: Philosophical Library, 1950), 60.]
There are many more testimonies. Would anyone deny the godly fruit of such a martyr or claim that men such as John Knox and George Wishart were fools or liars.