[aurelwu]

Some non-orthodox chess variants have a piece which combines Queen+Knight: https://en.wikipedia.org/wiki/Amazon_(chess)

very old variants often had such compound pieces like for example: https://en.wikipedia.org/wiki/Grant_Acedrex

[porphyra]

There's also the knook that combines the Knight and the Rook, which was hilariously invented as a meme on /r/anarchychess: https://anarchychess.fandom.com/wiki/Knook

[Izkata]

Here's a whole page of chess variants, many of which include such invented pieces: https://en.wikipedia.org/wiki/List_of_chess_variants