So both databook 4 and manga implies this.
We can read what Hagormo said about Madara."Indra succesor has obtained power of ten tails a power close to mine"
So this Madara was already close to Non JJ Hagoromo
At that moment Madara had only 1 rinnegan eye and he didn´t have Shinju tree power inside him.
Later he recieved second Rinnegan and Shinju tree . Is those 2 enough to make it on Hagoromo level of power ? Logically yes and this is what Kishi said about Dual Rinnegan JJ Madara :
3. よいよ機は熟さん。。。!両眼 の ”輪廻眼”を回収し、六道の 真の力を解放するマダラ。両眼から� �� �� �たれし鋭き光彩はまさに剛毅果断� �� �� ��たマダラの計画遂行を待ちわび� �� �と 意志を示すが如く、月につぼみを神� �� �� �。「輪廻の力を持つ者が月に近づ� �� �� ��時、無限の夢を叶えるための月� �� �映 せし眼が開く」 。。。うちは一族の石碑通り、マダ� �� �� �の額には「第三の眼」が開眼。 全てを否定し、忌まわしきチャ クラの無き世界を創るため...。 マダラが望んだ,「本当の夢」は今こ� �� �� ��に完遂した…はずだった。
An excellent opportunity came to fruition…!! Recovering the “Rinnegan” for both of his eyes, Madara unleashes the true power of the Sage of Six Paths!
So as confirmed by Kishimoto himself he was at Hagromo level at that moment.
Part 2:
What Hagoromo said back then : " and is attempting to gain power like Kaguya´s" and "the Mugen Tsukuyomi does not only create genjutsu it put one into illusory dream forever,and each person lives on in that dream while the user has access to their power"
So with Rinne Sharingan Madara gained the strongest power only he and Kaguya had and after casing IT and god navity of a world of trees he literally had all IT victims power in his hand
We can read what Hagormo said about Madara."Indra succesor has obtained power of ten tails a power close to mine"
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So this Madara was already close to Non JJ Hagoromo
At that moment Madara had only 1 rinnegan eye and he didn´t have Shinju tree power inside him.
Later he recieved second Rinnegan and Shinju tree . Is those 2 enough to make it on Hagoromo level of power ? Logically yes and this is what Kishi said about Dual Rinnegan JJ Madara :
3. よいよ機は熟さん。。。!両眼 の ”輪廻眼”を回収し、六道の 真の力を解放するマダラ。両眼から� �� �� �たれし鋭き光彩はまさに剛毅果断� �� �� ��たマダラの計画遂行を待ちわび� �� �と 意志を示すが如く、月につぼみを神� �� �� �。「輪廻の力を持つ者が月に近づ� �� �� ��時、無限の夢を叶えるための月� �� �映 せし眼が開く」 。。。うちは一族の石碑通り、マダ� �� �� �の額には「第三の眼」が開眼。 全てを否定し、忌まわしきチャ クラの無き世界を創るため...。 マダラが望んだ,「本当の夢」は今こ� �� �� ��に完遂した…はずだった。
An excellent opportunity came to fruition…!! Recovering the “Rinnegan” for both of his eyes, Madara unleashes the true power of the Sage of Six Paths!
So as confirmed by Kishimoto himself he was at Hagromo level at that moment.
Part 2:
What Hagoromo said back then : " and is attempting to gain power like Kaguya´s" and "the Mugen Tsukuyomi does not only create genjutsu it put one into illusory dream forever,and each person lives on in that dream while the user has access to their power"
So with Rinne Sharingan Madara gained the strongest power only he and Kaguya had and after casing IT and god navity of a world of trees he literally had all IT victims power in his hand