If GUILTY didn't deserve #1 so I can't find other albums that were released this year (by females) that did
but that's my preference!
It didn't get #1 for the only reason that kobokuro's album's sales were still strong on their 3rd and 4th week, GUILTY's first week was strong and brought her #1 but since those 2 weeks were combined as an oricon yearly tradition kobukuro's album went up to sell better. That's why GUILTY got #2. It would get #1 if the 2 weeks weren't combined.
It's not like it didn't peak at #1 at all but officially as oricon do it for the 2 combined weeks it got #2.