Since the Yearly manga sales are going to get released very soon most likely, let's look at the sales for the first half of the year and maybe throw in some predictions.
Here are the manga and light novel sales rankings for the first half of the fiscal year of 2017 (November 21, 2016 - May 21, 2017).
Manga Sales by Series
*1. 5,969,851
One Piece
*2. 3,974,437 Shingeki no Kyojin
*3. 3,244,618 Kingdom
*4. 3,086,097
Haikyuu!!
*5. 2,154,752 Tokyo Ghoul:re
*6. 2,097,088
Boku no Hero Academia
*7. 1,982,356 One Punch-Man
*8. 1,881,062 Nanatsu no Taizai
*9. 1,653,403 Detective Conan
10. 1,469,092
Shokugeki no Souma
11. 1,366,004 Ao no Exorcist
12. 1,357,012 Magi
13. 1,204,705 Fairy Tail
14. 1,090,487 3-gatsu no Lion
15. 1,000,886 P to JK
16. *,960,590 Nigeru wa Haji daga Yaku ni Tatsu
17. *,936,645 Cardcaptor Sakura: Clear Card-hen
18. *,927,125 Terra Formars
19. *,888,546 Diamond no Ace Act II
20. *,879,495
World Trigger
21. *,847,561 Tokyo Tarareba Musume
22. *,833,135 Kuroshitsuji
23. *,826,564 Days
24. *,795,445
Gintama
25. *,794,612 Wotaku ni Koi wa Muzukashii
26. *,794,342 Yowamushi Pedal
27. *,791,393 Tensei shitara Slime Datta Ken Series Comicalize Series
28. *,790,032
Black Clover
29. *,757,375 Boruto: Naruto the Movie Comicalize Series
30. *,752,854 Major 2nd
Source:
https://myanimelist.net/news/50938285
My predictions:
One Piece will stay at the top and will sell slightly less than it did last year. (safest prediction ever)
I think
Haikyuu!! will remain in the top 5.
I think it's possible that
Boku no Hero Academia managed to make the top 5 this year and if it doesn't it will be close.
Shokugeki no Souma will probably make it to the top 10 and if it doesn't then it will make the top 15.
World Trigger won't be in the top 30 this year, RIP.
Gintama will probably make the top 30.
Black Clover will be in the top 20-30 area with something like 1.8-2 million sales