It's not just a quote on a sticker, it's the literal truth. Any data stored on "the cloud" is stored on another system, and the most popular ones are owned by Google and Apple. Given that metric and even counting the servers owned by more credible organizations, really cuts down on how many password managers you can choose from down to...KeePass.
KeePass is simple to set up, simple to use, and simple to recommend. You download it, configure it, set up your database, and store it behind an authentication method. These can include some random file or even a FIDO2 key. The best part of KeePass is that you only need to remember a couple passwords, so go wild with the complex passwords.
The KeePass versions I recommend:
KeePass clients works universally no matter what they are. The steps to generate a fresh password:
When you make your password, look at the requirements on the account you're making it for. For example:
With those in mind, you put the character account at 36 characters and hit the toggles for upper-case, lower-case, numbers, and specific special characters. KeePass will generate some random password for you that will fulfill the requirements. Your password should look like this:
And now you only have to remember a couple passwords, including your database password. Let KeePass do the work for you and you won't have to worry about multiple accounts getting breached.
When using KeePass, simply open it up (you can actually change it to your default keyboard on Android for password filling purposes) and do the following: