Password Safe with Yubikey (2FA).
Cryptomator + MEGA works great too.
KeepassX and Lastpass are good managers.
TeamDrive or SpiderOak or Seafile/Seacloud are great private Linux friendly cloud solutions - but Zoolz Intelligent, pCloud and Crashplan should not be missed in the category they all are excellent providers .
Interesting: According to Kevin Mitnick in his latest book on the Art of Invisibility recommends complex passwords of at least 25 characters or more...