People who make indie games usually want everything in their game to look as similar in style as possible, so a pack with general icons would be great imo. You can look up RPG Maker icon sheet to see the usual stuff people want. Basically more misc stuff :P The people who sell the most assets seems to be the ones who have the full package (icons, tilesets, characters etc..) so a developer can make an entire game with it. This is ofc a large undertaking but it seems to work for them as far as I can see.
I was about to add that maybe the misc pack should be free in order to attract people to your profile, but you already made a free tileset pack I see. Having free packs works great, I have a shitty weapon pack with like 30k downloads, people love free stuff xD