Mu-hammed ibn Abd-al-Wahhab at-Tamimi an-Najdi regarded himself as a prophet! Not by saying "I'm a prophet", but by saying the following:
وأنا أخبركم عن نفسي والله الذي لا إله إلا هو لقد طلبت العلم واعتقد من عرفني أن لي معرفة وأنا ذلك الوقت لا أعرف معنى لا إله إلا الله، ولا أعرف دين الإسلام قبل هذا الخير الذي من الله به. وكذلك مشايخي ما منهم رجل عرف ذلك، فمن زعم من علماء العارض أنه عرف معنى لا إله إلا الله أو عرف معنى الإسلام قبل هذا الوقت أو زعم عن مشايخه أن أحداً عرف ذلك فقد كذب وافترى ولبس على الناس ومدح نفسه بما ليس فيه
"And I inform you about myself - I swear by Allah whom there is none worthy to worship except Him - I have sought knowledge and those who knew me believed that I had knowledge while I did not know the meaning of La Ilaha Illa Allah at that time and did not know the religion of Islam before this grace that Allah favoured.
As well as my shaikhs (teachers) no one among them knew that. And if someone from the scholars of al-'Arid (the lands of Najd and surrounding areas) claims that he knew the meaning of La Ilaha Illa Allah or knew the meaning of Islam before this time, or claims on behalf of his teachers that someone from them knew that, then he has lied and said falsehood and deceived people and praised himself with something he does not possess."
Source: "Al-Rasa`il al-Shakhsiyyah": Here
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