Yongnuo is hard to beat, even by Nikon.
Some Neewer is good, but Neewer is a mixed bag, importing flashes from different manufacturers... I returned a Neewer NW-985N (actually a Triopo TR985N), it had mulitple poorly done features (HSS mostly poor, some Commander). Basic TTL and Manual worked OK.
But the Neewer VK750 was a very pleasant surprise, very decent, well worth its low price. It is made by Meike. Reviews at signature link below.
The major thing I miss on third party flashes is that Nikon flashes blink a warning or beep when the TTL power capacity is insufficient (underexposure). This tells you increasing compensation cannot work, you need to adapt to the situation. I have not seen that on third party flashes (probably a communication issue, perhaps proprietary?)
And sometimes little features are not there, for example, third party flash may not blink the viewfinder ready indicator...
Or Manual distance scale only shows meters, etc. Nothing we can't live without.
But most of the third party I've seen are very capable flashes. I really see no reason to look beyond Yongnuo.
One feature they don't have, which is a good thing, is that they don't respond to TTL BL metering reducing the flash level when the dumb D-lens reports grossly wrong distance information. Nikon designs their flash system that way, but their zoom lenses cannot report accurate distance info. They use it anyway. Hard to fathom... So Nikon flashes are pitiful about that, but the third party flashes don't do it, no problem. Here is one discussion about it:
Non-Nikon brand flashes bypass the TTL BL Zoom Problems