@ TLK, psyah
Wa As-Salamu 'Alaykum
respected brothers, the response to your questions/comments is lengthy and it will lead to off topic discussion. If you wish we can continue here or use pm, but for now let me say this
Wa’alaykum As-Salam
no, this is not correct akhee. Does fiqh come before tawheed? To be Sunni is to follow the Qur’aan, the Saheeh Sunnah and the understanding of the Salaf. You can’t say that all of the 3 groups, Atharis and Ash’ari and Maturidi, are correct when they clearly contradict each other and brother this is 'aqeedah we’re talking about not fiqh.
Please brother don’t include the Athari with groups of Kalam. This is an alien notion and a grave mistake. Athari are those who follow the understanding of the Salaf in regard to Allah’s Sifaat and the Salaf clearly forbade the use of Kalam. The Kalam became popular later in the 4th centruy of Hijrah when the Ash’ariyyah emerged. The book on 'aqeedah by Imaam Tahawi (rahimahullah) is a Sunni book not a Kalami Maturidi book. The Mautridis creed contain no element of Athari creed in regard to the Sifaat of Allah.
first brother, a madhab doesn’t only constitute the verdicts/opinions of original Imaam (rahimahullah). It constitutes the verdicts/opinion of all the scholars of that madhab. Second, it is true that deaobandis follow hanafi fiqh and outwardly it may appear that they’re strict followers; however, as far as i know they differ with orthodox hanafis on fiqhi matters i.e. the issue of halala marraige.
In regards to 'aqeedah, most of the later hanafis have been maturidi and so are the deaobandis. They differe with Ahlus Sunnah on many issues i.e the status of Prophet’s (sal-allahu 'alayhi wa salam) life in his grave
well, it is not exactly true; there have been some books attributed to Imaam Abou Hanifa (rahimahullah) i.e. Fiqhul Akbar, Fiqhul Asbat. As far as i know, these two books at least have been falsely attributed to the Imaam (rahimahullah), I don’t know about others. You can read about these two here.
Wallahu A’lam