Yeah. Nobby could have been better, but I was trying to be positive. ;-)
I always think of Nobby as Tony Robinson in Baldrick mode, but ho hum.

Peter Guiness I usually like, but in some scenes he was terribly hammy - perhaps due to the blocking, I'll admit.

As for Death... yeah, I know his jaw isn't supposed to move, but on film it doesn't work so well. With the voice as in the cartoon it could - Christopher Lee in full graveyard mode has more of an "in your head" sound.