If you search for bold sans font with formal looks, then this Peace Sans is a perfect choice
Designed by Sergey Ryadovoy and art-directed by Ivan Gladkikh, this sans styled font is a perfect choice if you want to create a bold but formal look and feel graphic design. Thanks to Sergey, this font is released with Open SIL license. This means you can use it for anything even for commercial use.
as you can see above the font is really stand out. If you want to combine it, I suggest using the opposite look and feel. for example, as follows:
- Much thinner sans
- Serif with normal weight
- Thin or normal weight script.
Also I personally love to use this font as an all uppercase because it looks more tidy. How do you think?