You could go vintage and get a Gillette Slim or a Gillette Fatboy. These are adjustable and you can have a lot of fun working out the best setting for you. You could get something in the Merkur range. Some of their razors are on the milder side. Another good razor which I like using is a vintage Schick Krona. They have a long handle. A vintage Gillette Tech would be another good choice. That’s another question that I should have asked you. Do you like a short or long handle?
Excellent, plus 1. I would add the Gillette Super Adjustable. For modern Adjustable's, the Parker Variant or Merkur Progress. We can suggest a long list of razors that we like but it all boils down to the research you do and what you like.
Try: Double-Edged Safety Razors Ranked by Blade Gap - https://www.badgerandblade.com/forum/wiki/Double-Edged_Safety_Razors_Ranked_by_Blade_Gap