Trappist-1e is, in my opinion, the best candidate for extraterrestrial life we know of. Unlike Trappist-1d, it is actually denser than Earth. This is great news, because the problem with other planets in the Trappist-1 system, such as Trappist-1d, is that they are not very dense, implying that they have ridiculous amounts of their mass in water. Trappist-1e, however, is thought to have an amount of water similar to that of Earth. This means it most likely isn't a complete water world. (If it is, it's probably a shallow one) It most likely has a solid, rocky surface, with at least some water on it. I'm not going to jump to conclusions about whether or not Trappist-1e has life on it though. Yes, this planet could be habitable, but just because a planet is habitable doesn't mean it is inhabited. But if it does have life on it, I think it is probable that Trappist-1d does as well. This is because considering how close to each other the planets in this system are, it is incredibly likely that life would be transferred between them by panspermia. Even though abiogenesis is probably not possible on Trappist-1d, some life from Trappist-1e could easily be transferred to Trappist-1d, and this is possible for Trappist-1f as well if it does have an ocean. Over all, Trappist-1e is extremely promising. It seems to be an at least somewhat Earth-like planet.