Although Dickinson never received formal training, he still possesses a wide vocal range which was trademarked by his quasi-operatic tenor. Along with Ronnie James Dio and Rob Halford, Dickinson is one of the pioneers of the operatic vocal style later to be adopted by power metal vocalists and regularly appears near the top in lists of the greatest rock vocalists/front-men of all time. Dickinson says that his style was influenced primarily by Arthur Brown, Peter Hammill (Van der Graaf Generator), Ian Anderson (Jethro Tull) and Ian Gillan (Deep Purple).