Manga finished before latest anime

Almost certainly finished
https://en.wikipedia.org/wiki/Musashi_no_Ken - manga ended 1985, anime 1986 - subs are poor.

https://en.wikipedia.org/wiki/Baoh - manga ended 1985, anime 1989.

https://en.wikipedia.org/wiki/Blood_Reign:_Curse_of_the_Yoma - manga ended 1986, anime 1989.

https://en.wikipedia.org/wiki/Yaiba - manga ended 1993, anime 1994.

https://en.wikipedia.org/wiki/Lament_of_the_Lamb - manga ended 2002, anime 2004.

https://en.wikipedia.org/w/index.php?title=Touch_(manga) - anime ended a year later than manga in 1987, latest live-action 2005.

https://en.wikipedia.org/wiki/Nasu:_A_Migratory_Bird_with_Suitcase - ended 2007 - https://myanimelist.net/manga/1245/Nasu - ended 2002 - unadapted spin-off one-volume manga ended 2008, though.

https://en.wikipedia.org/wiki/Basquash! - manga ended September 26, 2009, anime October 1, 2009; remake not made.

https://en.wikipedia.org/wiki/The_Disastrous_Life_of_Saiki_K. - manga ended July 26, 2018, anime December 28, 2018.

Problems
https://en.wikipedia.org/wiki/Speed_Racer - not all (subbed) eps available (dubs are).

https://en.wikipedia.org/wiki/Aim_for_the_Ace! - anime ended after manga but sequels seem unsubbed.

https://en.wikipedia.org/wiki/Notari_Matsutar%C5%8D - 1990 OVAs not found.

https://en.wikipedia.org/wiki/Attacker_You! - latest anime from 2008 (half of eps available).

Uncertain
https://en.wikipedia.org/wiki/Mahjong_Hish%C5%8D-den:_Naki_no_Ry%C5%AB - anime ended 1990 - https://myanimelist.net/manga/17349/Mahjong_Hishoden__Naki_no_Ryuu - manga 1991, exact date unknown (OVA same year)

https://myanimelist.net/anime/29603/Kurokan - manga seems ended before; CR: "manga series created by Norifusa Mita that appeared weekly on “Manga Goraku” from 1996 to 2002".

https://en.wikipedia.org/wiki/Idaten_Jump - https://www.animenewsnetwork.com/encyclopedia/manga.php?id=6496 - manga ended some time in 2006, can't find exact date, anime 2006-09-30.

https://en.wikipedia.org/wiki/Gokusen - manga ended 2007, anime 2004, but live-action 2009.

https://en.wikipedia.org/wiki/King%27s_Game_The_Animation - finished after all manga released, but does it cover so much material?

https://en.wikipedia.org/wiki/Akagi_(manga) - anime ends before manga's end in 2018, but live-action ends a few months after and might have adapted it fully.