I'm male in my late 30s with deep nasolabial folds. It gives my face a droopy look. (Photo)

For this type of face you really need implants and a face lift to get the most improvement.  You have very little underlying anatomy to support fillers and even at a younger age you have skin sagging. With that said if you are not willing to do surgery to get the most improvement you can do other treatments to help your skin and volumization and laxity/sagging but results will be just small improvements.I suggest a combination approach of :
1) skin care with products and PRP/microneedling

2) PDT light therapy few times a month with growth factors
3) laser treatments like clear and brilliant regularly and a few times a year Fraxel, Viva, or Co2/Erbium
4) Sculptra injections a few times a year for collagen production
5) thermage/ultherapy for yearly skin tightening6) fillers to help lift and contour the cheeks, under eyes and folds7) sculptra to build collagen long term8) threads to lift the cheeks and folds like instalift

Great question. Of course there is face lift and aggressive resurfacing but that involves lot of down time too. Among no down time, the options are ultherapy and /or fillers. I like starting with lifting and tightening with ultherapy and then follow with fillers if needed. Consult with an expert is essential to address ear;y and mild laxity.