For something easy and leak free, try any of the variations of the Kayfuns out there. Hcigar and Ehpro make good ones.
If you are looking for a warmer vape from something with a coil on top, try a genesis style tank. Look up youtube videos on getting a genesis style tank set up on auto drip mode with cotton wicking. Much easier then messing with stainless steel mesh, but still not as easy as the Kayfun. Also, these tend to leak if you lay them on their side.
Finally, you have the various different RDA's or dripper style rebuildables. There are a ton of these out there. My first was a Nimbus clone that had three posts for dual coil builds. I only ever built one coil in it though, and it worked fine. It is also the easiest one for me, as there are holes in the posts to stick the kanthal through, rather then screws to wrap kanthal around.