how come everytime such a thread gets started all these bands get mentioned that often don't sound anything like opeth! ... for example November's Doom, I really do not understand how people can say they sound similar. As soon as a band uses both growls and clean vocals in songs, they are claimed to sound like Opeth, which is ridiculous.
Furthermore, also funny how everytime only "similar" bands to orchid and morningrise get mentioned, while new people probably are asking about bands doing similar things like on opeth's newer albums. Of course, there aren't any similar bands
So to the threadstarter, clarify please, what do you actually want? You want bands/songs that are similar to their soft side (which era soft side?) ... Well to put in my contribution, the song Omerta by Katatonia always sounded to me as if it could have been on Damnation.
In any case, appreciate bands on their own, any good band is unique in its own way and doesn't sound "similar" to many other bands.