Answer: sanest

AnswerCrossword Clue
SANESTLeast dotty
SANESTMaximally balanced
SANESTTouched the least
SANESTLeast crazy
SANESTHaving the most reason
SANESTLike Zeppo, among the Marx Brothers
SANESTLeast buggy
SANESTClearest of head
SANESTMost mentally sound
SANESTOf soundest mind
SANESTLeast batty
SANESTMost compos mentis
SANESTLeast lunatic
SANESTLeast addled
SANESTLeast mad
SANESTLeast deranged
SANESTMost level-headed.
SANESTMost logical.
SANESTMore clear-headed
sanestSANE, mentally sound, also SAIN
sanestfree from mental disorder; rational
SANESTLeast bananas
SANESTMost reliable
SANESTMost sound, mentally
SANESTMost with it
SANESTMost mentally fit
SANESTMost together mentally
SANESTMost reasonable.
SANESTFarthest from left field?
SANESTLeast bonkers
SANESTLeast off-the-wall
SANESTLeast nutty
SANESTMost stable
SANESTLeast likely to be out to lunch?
SANESTLeast likely to lose it
SANESTMost rational
SANESTLeast mental
SANESTLike one with the most marbles?
SANESTLeast wacko
SANESTLeast likely to blow