Rangpur is great! I like the aroma and taste and but pretty much use them for meat and fish. It's a bit each like mandarin, lime, and lemon. Part of the aroma reminds me of kaffir lime, but more mild. I can see how dressing would be good; would you mind sharing a recipe?
I'm sure there are other uses (I've read marmalade is good and that it can taste good mixed with orange juice), but I'm pretty happy using it for savory only.