Interesting question... the trouble is in the part about flowers similar to a peace lily. What counts as being similar to the peace lily? I first thought about a white calla lily, but unfortunately, I think it's probably more toxic than the peace lily. How about a gardenia? They are commonly grown as house plants, have beautiful white flowers and have beautiful fragrance (which the peace lily doesn't) and is listed as non-toxic.
(this site https://lancaster.unl.edu/factsheets/031.htm has a list of Toxicity of Common Plants)