Peter Philips is really quite early -- wiki says he was born in 1560 and died when he was 60 years old. Maybe the closest continental comparison is Titelouze and Ascanio Mayone, or perhaps Giovanni de Macque. Is Philips's keyboard music more backward looking than Titelouze's or Mayone's or de Macque's? I can't answer that off the cuff, it's a hard question. Just from informal listening the toccatas in Trabaci's Bk 1 (1603) sound very Peter Philips like to me.
Or Frescobaldi? He's a generation later really, there's a 20 year age gap. There's nothing quite like the Cento Partite in Philips, but you've got to bear in mind that it's a late work. Having said that, there's nothing like the 9th or 11th toccatas form Bk 2 either-- Frescobaldi's just the better composer!