Is there any list with weapon types that does not drop often and it is worth to keep them when they drop?
Besides this maintained sheet Vel's NRFTW Runes and Weapons - Breach Refined - Google Sheets , no.
What you can do however is buy a house, and save 1 copy of each weapon you find. It will take a lot of space but not as much as you would think.
I have currently 1 medium chest for 2-handers, 1 for bows, knives and spears, 1 for shields and a big one for 1-handers. Hope this helps!
That is a good idea. How many chests can i have in a house?
Is there really no Legendary One handed Strength sword? I really don’t get the design decisions of these devs.
There are more weapons in the game but just not added until end of EA I guess, I think some of the unreleased weapons needs some more time to get worked on before they release em.
Most of the legendary weapon in-game at the moment seems to be connected to a few Bosses or tied to a specific region. So I guess for a strength legendary one-handed you might have to wait on some updates for that one.