Better solo artist -- Monk vs paladin?

[Selene]

Hello,

I have a 50 monk and a 51 paladin and I've now reached the point where I feel like I have to choose between the two in terms of who to invest more time in. I just don't have the time to play a lot to camp items endlessly or raid constantly due to real life engagements (my 55 mage on blue was made in 2017, my 57 druid on green was made in march 2020....the melees were made around the time covid hit, too. So i'm slow and need to pick one now...)

Between monk and paladin, which class is the better solo artist? I made both because I like the idea of soloing tough mobs, especially in the context of solo dungeon crawling. When geared at their best or near best (it may take me many years, but I hope to get there someday), who is more capable? My gut tells me paladin because of their toolkit but wanted to get some expert advice. I want the class I can not only explore deep in dungeons with, but also kill nameds by myself or do tough camps by myself because I love challenges. Thanks!