African raptors and birds on buffalo (1 Viewer)

Thanks to all the great help yesterday, the Southern African birds are all identified successfully. When going through my pictures last night, I found five more where I hope you can help:

#1 - Ngorongoro crater rim, Tanzania, June 2017. Sorry for the bad resolution, but maybe someone can tell?
#2 - Masai Mara, Kenya, June 2017. Thought it could be a juvenile Tawny?
#3 - Lake Manyara, Tanzania, June 2017. From what I learned yesterday, I would guess Wahlberg's Eagle?
#4 - Okavango Delta, Botswana, March 2018. This guy confuses me due to the completely blackish-grey bill. Is it a juvenile?
#5 - Masai Mara, Kenya, June 2017: Birds on a buffalo, but they are not oxpeckers. I was thinking about starlings, do not know which ones they could be.

1. Augur Buzzard
4. Brown Snake Eagle
5. Wattled Starlings

2 is a young Tawny indeed and 3 is really difficult: Wahlberg’s or still Tawny? Massive body and long vertical nostril look better for Tawny

3 is a Tawny indeed.