If you're a very occasional fountain pen user (like me), I have found the Platinum Desk fountain pen is very good at not drying out when left unused for longer

If you're a very occasional fountain pen user (like me), I have found the Platinum Desk fountain pen is very good at not drying out when left unused for longer periods. It does put down a very fine line though, and it won't play nicely with crazy particle-heavy inks.