4 is her second best album not B'Day. B'Day would have been fine if it wasn't re-released that way.
She should have gone right from the start (September 2006) with:
1. Déja Vu
2. Get Me Bodied
3. Suga Mama
4. Upgrade U
5. Ring The Alarm
6. Kitty
7. Freakum
8. Beautiful Liar
9. Green Light
10. Irreplaceable
11. Resentment
12. Flaws & All
I ♥ WWideW but could have dig it even if it was unreleased. tracklist is too important for making a classic album.
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Beyoncé career evolution is a Madonna-meets-Mariah-meets-Janet-meets-Michael which is an excellent
thing. It would take me a book to explain it but they all have similar perfect run.... this being said lets imagine her
6th album

(only Michael made an impactful sixth album

I mean Thriller)
I don't think her career is similar to Tina Turner tho. they have the same stage presence but it's not even intentional.