I found a unit frame addon that has plenty of options but not too much shit to bog you down

also it has a copy and paste import export feature for the layout so you only have to config for 1 toon then just copy and paste the config for all

also seems to be low on mem usage like less than 900kb

Link is here its called shadowed unit frames


ps i have a copy of my hunter layout with emphasis on the pets since i tank at lvl dungeons with them if you want
just pm me and ill give it to you i would just post it here but its too long