I second
miwa. Her newest album Delight is really good and looking at what you like, I think she might be the right blend of pop-rock to fit your taste.
I'd also recommend
GILLE. She's a rather new artist and I think she's a bit like MiChi in some ways: lots of English, many uplifting songs, does both covers and original songs - but she has a whole different edge than MiChi, not a copycat by any means. Her first original album GILLEsound Vol. 1 came out earlier this year and it's amazing, I'd recommend her to anyone.
girl next door might be to your liking, try their third album Destination maybe?
If you're into house at all, try
DAISHI DANCE, his music is mind-blowingly good. His newest album, WONDER Tourism, in addition to just generally being phenomenal, has a collaboration track with Crystal Kay; I'd recommend checking the album just for that.
Sad to see you don't like
globe, they're one of my favorite groups. ;_; I don't want to be annoying, but if you've only tried them once, maybe give them another chance? They've got a variety of amazing stuff and you may be missing out on something you might really like. There's a download thread with all of their albums available
right here at AHS (and the links even seem to be working!) so it should be easy to try one if you feel like it.
Should their trance stuff interest you in the future (I think the trance era is the best thing globe ever did), try Lights or LEVEL 4, or if pop-rock is more your thing, globe2 pop/rock or the mini-album new deal might be good to try out.
I don't see
Nami Tamaki on either of your lists? You've probably heard of her before, I think she was a pretty big name some years ago. You might want to try her if you haven't already, she has a bunch of really good stuff. I think her fourth album, Don't stay, is her best, but opinions seem to vary on that topic.
Out of the things others have mentioned, I second capsule, JASMINE, BENI, Kalafina and ESPECIALLY everything
I've Sound related (Eiko Shimamiya is my absolute favorite artist, KOTOKO, Mami Kawada, MELL and the I've Girls Compilation albums are definitely worth trying).
Oh, and one more thing! I really like
yanaginagi, she's definitely worth a try. Her stuff is a bit different, but maybe you'll like it! Her new album euaru came out just a few weeks ago, I think it's a very interesting collection of songs.