Recommended reading to better your craft

What are the must have read books to get better at writing fantasy and what to take from them?

Lotr - (duh) but the main take away are the descriptions (in todays literature long descriptions are frowned upon but there is still so much beauty to learn from)

Brandon Sanderson - technical get out of way prose (there's a lot of discussion about his writing lately but no one can deny that he mastered this style of prose, whether it's good or bad is just a matter of taste)

Steven Erikson (Malazan) - world building (obviously)

Terry Pratchet (Discworld) - humour (obviously)

What are your picks and what should one focus on? Which series helped you the most to be a better writer?