More unique bosses?

Although I fucking love this game I feel like the bosses are underwhelming. Every assassination mission has almost the exact same dude at the end (mechanically) and you basically get no rewards for fighting mini bosses like the beast of nurgle or daemon host. There is so much potential for insane bosses in this game. More daemons? Maybe even a plague marine? Like so many other areas of darktide, it just leaves me wanting more.

What are some of the enemies/ bosses you have been wanting in the game?