I keep my tank at 76F, and my danios/gourami are thriving. I've had them for almost a year now with no ill effects.
I like the new stocking list! Looks like a good mixture of top/mid/bottom fish... just watch the Danios and the Gourami and make sure they don't compete for the top section. My Gourami is actually pretty calm but I have never put him with any fish that would cause him to show aggression. He does chase my Danios from time to time
Guppies have a HUGE temperature range, but the temps effect their bodies. Lower temps cause them to slow down their metabolism, which slows down breeding and aging. Higher temps cause them to live shorter lives, but breed like rabbits. I believe anything 70-80F is best for them, depending on what you feel comfortable exposing them to.