I don't see how that's funny. I guess you maybe listened to something from the final two albums, which are still amazing anyway though not similar to Agalloch in any way. Otherwise, I'm just not understanding you.
I don't think you're going to find any bands that are exactly the same. There's definitely similarities, and Agalloch has said they're a big influence on their music.
I think both would work. Heart Of Ages is more black metal and Omnio is more like experimental-progressive. These releases are very different, just like Agalloch's music.
I tired to get into In the woods, but someone deleted all my files like a year ago and I didn't spend as much time as I should but time time around I will
and yes Ulver's debut is definitely an awesome album and Agalloch sure does seem to draw some influence from that release.