Østberg would fit as a driver for fast gravel rallies in combination with Sordo. He was never great on tarmac, even though he seems to have improved in R5 I doubt anyone would put him in WRC on tarmac.

Anyway calling him very reliable is quite a stretch. He is reliable when he doesn't drive at full speed. Else there is an issue every two stages, often self induced. (lately in Greece he broke front suspension cause he jumped too much with RWD, before that in Estonia he first broke suspension on a jump and right after service got puncture cause he mowed down a concrete anti-cut).