The only one that I make myself isn't a creamy one. It is a basic Italian dressing. This is what I use, but you can really tweak this one until you get the consistency and taste that you like.
Olive Oil
Apple Cider Vinegar
Water
Lemon juice
sugar
Italian seasoning mix (If you prefer this to be fresh, just cut up some actual garlic, basil, thyme, oregano and add a little onion powder)
I don't have exact measurements with it because this is one that you adjust to what tastes good to you. You may have to try a few batches before you get one you actually like.
Could you post your recipe for the French dressing, that is my family's favorite if given a choice.