Well, I'm an extreme PPP, and my favorite product to give me a glow isn't a highlighter. It's La Mer translucent loose powder. It has this hint of glowy irridescence, but is totally natural looking. Yes, it costs an arm and a leg, but it gives a super natural every day glow. I adore this powder.
For more traditional highlighters, I love Perfect Topping msf, Becca Nymph or Angel PSP, NARS Copacabana, and Jemma Kidd Rose Gold Highlighting Cream. Yes, I love highlighters.
I also have several blushes with some shimmer to them that make me look glowy -- Chanel JC in Narcisse and Turbulent, and Rock and Republic Call Me blush.