A good hotel close to Seoul Station is The Plaza Seoul Autograph Collection (rated 8.7/10 from 383 reviews).
The Plaza Seoul Autograph Collection is rated 8.7 from 383 reviews and is close to Myeong-dong Subway Station.
If you’re visiting Hongdae Area then the nearby Holiday Inn Express Seoul Hongdae is a popular hotel with HotelsCombined users (971 reviews scoring it at an average 8.7/10).