I’ve always used the Gillette razor with the triple blades. Then I go different directions and it has always been smooth as hell. You can also go to a beauty supply store and get a electric razor, forget what there called but they are square and work really well. Cost about 80-100$
Gillete mach three every fourth day and aquafor right after keeps mine stubble free and amooth/shiny for most of those days. I'm a hairy beast so keeping it purely skin tight only works for about 2/3 days no matter what I do.