Generally, with a stain of unknown solvent, I progress from the least potentially harmful to the most in an order something like the one below. I'm sure others will want to add to this to fill in blanks. From what you have already used, the only common solvent that you might not have used yet is alcohol.
water soap and water ammonia/water vinegar/water alcohol oil or wd40 paint thinner acetone specialty products that are good are: "oops!" "goof-off" and some citrus based proucts.