I"m in search of a wordpress theme, I need a suggestion Please

I’m in search of a simple layout for an investment group, they would like to have a login in screen for member only content. Users will be issued login credentials that will allow them to access the private screens on the website.

It can be a sign up and then authorized access or back end access granted.

Hopefully what I’m asking for makes sense.

Anyhelp finding a solution that I can use is very appreciated.

For that you can use and default template and some membership plugin. It all depends what you want and how big budget you have?
Is this on Wordpress , multi language , what will be on that private pages. You will need provide some specifications.