Andrew Johnson was a tailor.

Cardinal Wolsey was a butcher's son.

So were Defoe and Kirke White.

Michael Faraday was the son of a blacksmith.

He even excelled his teacher, Sir Humphry Davy, who was an apprentice to an apothecary.
Virgil was the son of a porter, Homer of a farmer, Pope of a merchant, Horace of a shopkeeper, Demosthenes of a cutler, Milton of a money scrivener, Shakespeare of a wool stapler, and Oliver Cromwell of a brewer.
John Wanamaker's first salary was $1.25 per week.