I use default settings all the time but I think sharpness can come from a few elements combined. Try to use good high res/ quality textures especially on the main elements of your render (I usually set the bitmap filter to 0,1) and render at least a 3k 4k image. For noise level I usually target 3% but 4% can already look good in some cases. If it's done right you should be able to avoid sharpening in VBF or postproduction completely... but bit of contrast or clarity can also help. Hope these help :)