Are you against floating plants? Most fish like them - all of yours would probably, and they're easy. I've used Brazilian pennywort and water sprite. My hatchets have never jumped, but I don't leave the lid open, either, unless I'm cleaning or feeding.
The pencilfish I mean are these below, but you might not be able to find them everywhere - I'm not sure how common they are and my LFS tends to carry more unusual fish so I don't have a great concept of what's usually out there. They do have stripes like the black neons, but what's neat about them is their angled way of swimming. In a larger group (I have 12) they look pretty cool. Unique. But they are less showy than the hatchets. Everyone has different preferences - if you don't like them, it won't hurt my feelings.
Just giving some ideas. Others will probably chip in, too.
Look at the 5th photo down to see them in a group. (Ignore the info on them on that page, it's not accurate. Mine don't touch any plants at all! They also at the bottom have other fish labeled as nannostomus eques - the first 7 or 8 are them.)
http
/superfishcyprinidaewallpaper.blogspot.com/2012/07/nannostomus-eques.html
You could always go with a large group of cardinal tetras, though they're more middle swimmers. But they look great in big groups. I generally am not overly fond of danios. Some of the rasboras are cool, but I'm more of a tetra gal. But I also shoot for SA fish, too.