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Check some of Eman's posts I know he has low salt rubs and I think he has a couple of no sugar rubs.
You can use any rub mix you want, with or without added sugar. Sugar mutes the bitterness or heat of spices like paprika, Cayenne etc so if reducing the sugar you may want to reduce the amount of these type of spices. Remember chili powder has sugar in it so look for hidden sugar in the spice mix.
If you want no sugar you can always make sugar free BBQ sauce and add an artificial sweetener. Just don't add it to early.
I use a lot of natural fruit juices or artificially sweetened fruit juices in mops and finishing sauces when I want to reduce the amount of sugar. Do a search on the forum for "no sugar rub" and see what you get
There are lots of rubs that wold work. If you want to be lazy just grab some Tony Chacharros Creole Seasoning - it goes great on all 3. There is also Old Bay, Bad Byrons Butt Rub, and anything you can whip up yourself. Just use flavors you like... thats the key.