By best I mean
>best views
>requires effort but isn't very dangerous

The best mountain doesn't have to be the highest one but considering that my favorite mountain is currently the highest one I've ever climbed (Rysy in Tatra mountains, 2499 m) I think it often correlates.

I think Elbrus (highest European mountain if you stretch the definition of Europe) with 0.15% mortality rate is a good candidate, unlike Mont Blanc with 0.5% mortality rate. But the problem is that Elbrus is in Russia which means high crime rate and need for a visa.

There are also relatively easy mountains in Alps like Schrankogel (3497 m) and Breithorn (4160 m), although Breithorn is mostly known as easy because you can get a cable car up to 3820 m which takes away most of actual hiking.

Norwegian mountains are smaller but it's my dream to go there cause mountains protruding straight from the sea seem so beautiful.

Trails with no major peaks are a different category. They don't require as much effort but they can be beautiful too. Stołowe mountains are an example and they're my second favorite mountains I've been to, after Tatra. One day I certainly will visit the Slovak paradise for the same reason

>tl;tr
Those who have mountain experience in Europe, post the best mountain/trail you've ever been to and the one you want to visit