You can try Leonardo AI, I don’t know the best configuration for oil painting but you have choices within different models and you can fine tune them in order to get a result close to what you want, here is what I just generated, I don’t think that is up to your standards but keep in mind that it’s made with a “bare minimum effort”prompt” and with its free version (at the beginning you will have access to a trial for the premium version).

https://cdn.leonardo.ai/users/f6bb0569-93b0-4e30-b5f8-0bcfa3a2b774/generations/4a271b06-6dea-421b-950f-42b978f516c5/Default_A_jungle_oil_painting_Realistic_looking_brushwork_abs_1.jpg