Артель атаманом крепка
If you have a good leader, you are strong, otherwise you are weak. See Один воин тысячу водит (O), Сноп без перевясла - солома (C)
Cf: An army of hogs led by a lion is more formidable than an army of lions led by a hog (Br.). An army of stags led by a lion would be more formidable than one of lions led by a stag (Br.). Every plane has its pilot (Am.). Every ship needs a captain (Am.). A headless army fights badly (Am.). When the chief fails, the host quails (Br.). When the head aches, all the body is the worse (Am.)
Русско-английский словарь пословиц и поговорок.
Академик.ру.
2013.