Westhill last corner/T1 in reverse is so forgiving a corner it can't be considered. Sure it's hard to do fast, but you'll only wreck your car there if you mix it up with another driver.
The chicane at South City Classic is easy "if" you know what to do. If you dont you crash, and it's as simple as that really, but it shouldn't take long to figure it out as it's not that challenging a corner. As the lap unfolds i'm more concerned about getting the hairpin right than the chicane.
Aston's Eu Rogue is interesting, but not nearly fast enough in most cars to provide a challenge.
Blackwood GP rev is a difficult corner to get right, being one of the few corners where if you get it wrong you go flying across the inside! Once you've done some laps though it just becomes a difficult corner, not a dangerous one.
The last few corners on KY GP Long are quite low grip, but patch T, more downforce, or just driving a tiny bit slower solve that.
The corners I think are the most fearsome in LFS are the chicanes, because the physics system so easily turns you into a NASA experiment heading for Mars if you get them wrong. Fe Gold, Fe Green, Ky GP Long chicanes all spring to mind as corners where the impossible happens alarmingly frequently.