[Plugin: Changing Font Type] Themes Font But Preview Before Applying

I would like to obtain a plugin for WordPress that changes the font of headings, the body of the blog and so on where you can change the existing fonts but preview them before you apply.

I tried wp google fonts and easy fonts but I need to see it in customize as how it would look when applied. Those two never cut it for me, the interface is poor and I can’t see as there is no preview option.

It’s not hard but I have been having difficulties with the forementioned and I am scared to apply it to my blog unless I get some sort of positive feedback from those who may know the right plugin or a few stable ones I can try.

Please assist.