From amongst the untruths of Ibn Taymiyya which no scholar before him had said, and whereby he created dissent between the people of Islām, is that he denounced tawassul and istighātha (seeking aid) through him; and that is not as he had decreed (i.e. that it is impermissible). Rather, tawassul through him is hasan (good) in every state: before his creation and after his creation, in the dunya and in the ākhira.

See king Aid with the Prophet
Imām Ibn Hajar al-Haytamī