Hello!
The Abbasid Caliphate (abbasid_caliphate) is a very large issuer with many rulers, but luckily, most ruling authorities already have their coins on Numista. Here is what we need:
Al-Saffah, Caliph, 750-754, Q252087 (https://en.numista.com/catalogue/pieces80898.html)
Al-Mansur, Caliph, 754-775, Q31066 (N#81284)
^ The above coin is currently under the wrong ruling authority.
Al-Mahdi = The one we already have. :)
Al-Hadi, Caliph, 785-786, Q293490 (N#77207)
Al-Rashid, Caliph, 786-809, Q131002 (N#264594)
Zubaidah bint Ja'far, Consort, 786-809, Q2388506 (https://en.numista.com/catalogue/pieces81290.html)
^ She was the wife of Caliph Al-Rashid; Wikipedia lists this title.
Al-Amin, Caliph, 809-813, Q293495 (N#81315)
Al-Natiq Musa, Heir, 813 (https://www.zeno.ru/showphoto.php?photo=167519)
^ Son of Al-Amin, who proclaimed his as heir to the throne, although Al-Ma'mun got it. Couldn't find Wikidata item.
^ No coins on Numista yet.
Al-Ma'mun, Caliph, 813-833, Q61056 (N#81317)
Al-Mu'tasim, Caliph, 833-842, Q284550 (N#81323)
Al-Wathiq, Caliph, 842-847, Q284585 (N#81325)
Al-Mutawakkil, Caliph, 847-861, Q220789 (N#81336)
Al-Muntasir, Caliph, 861-862, Q284012 (N#81339)
Al-Musta'in, Caliph, 862-866, Q284157 (https://en.numista.com/catalogue/pieces81337.html)
Al-Mu'tazz, Caliph, 866-869, Q281989 (N#81408)
Al-Muhtadi, Caliph, 869-870, Q293458 (N#81410)
Al-Mu'tamid, Caliph, 870-892, Q284721 (https://en.numista.com/catalogue/pieces81571.html)
Al-Muwaffaq, Regent, 870-891, Q291410 (https://www.zeno.ru/showphoto.php?photo=176850)
^ No coins on Numista yet.
Al-Mu'tadid, Caliph, 892-902, Q284567 (N#81576)
Al-Muktafi, Caliph, 902-908, Q284701 (N#81677)
Al-Muqtadir, Caliph, 908-929, Q201465 (N#81683)
Al-Qahir, Caliph, 929; 932-934, Q284711 (N#81689)
Al-Radi, Caliph, 934-940, Q293442 (https://en.numista.com/catalogue/pieces82034.html)
Al-Muttaqi, Caliph, 940-944, Q284759 (https://en.numista.com/catalogue/pieces82063.html)
Al-Mustakfi, Caliph, 944-946, Q293640 (N#82066)
Al-Muti', Caliph, 946-974, Q284730 (https://en.numista.com/catalogue/pieces82068.html)
Al-Ta'i, Caliph, 974-991, Q284779 (https://www.zeno.ru/showphoto.php?photo=182391)
^ No coins on Numista yet.
Al-Qa'im, Caliph, 1031-1075, Q293626 (*** https://www.zeno.ru/showphoto.php?photo=301542 ***)
^ No coins on Numista yet.
Al-Muqtadi, Caliph, 1075-1094, Q293683 (N#82071)
Al-Mustazhir, Caliph, 1094-1118, Q293632 (N#82072)
Al-Mustarshid, Caliph, 1118-1135, Q293621 (*** https://www.acsearch.info/search.html?id=9228867 ***)
^ No coins on Numista yet.
Al-Muqtafi, Caliph, 1136-1160, Q293617 (N#82073)
Al-Mustanjid, Caliph, 1160-1170, Q293448 (https://www.zeno.ru/showphoto.php?photo=257170)
^ No coins on Numista yet.
Al-Mustadi, Caliph, 1170-1180, Q293646 (N#82074)
Al-Nasir, Caliph, 1180-1225, Q284750 (N#82075)
Al-Zahir, Caliph, 1225-1226, Q293450 (N#82076)
Al-Mustansir, Caliph, 1226-1242, Q293545 (N#82077)
Al-Musta'sim, Caliph, 1242-1258, Q293454 (https://en.numista.com/catalogue/pieces81313.html)
Andddddddddddddd that should be all of them. :)