If you want Lollipop, most people would recommend DN's roms because they always includes the latest stuff, like S6 apps as add-on. If you want something close to stock, you'll be fine with Wanamlite, which relies on Xposed Framework for the extra customization, sadly, no Xposed mods on Lollipop yet so Wanam's Lollipop roms are just like cleaned up/debloated stock roms.

I'm with Wanamlite's Kitkat, very stock looking but I get the most out of my phone with Xposed mods.

i gave up on Greenify already. At first it was working fine but after sometime it will failed to hibernate apps again. Have you tried Servicely? Im using Servicely now and so far battery improve so much compare to Greenify.