AliExpress has some of the best leverless controllers out there, and it also sells other kinds of controllers that you should check out.
3D printers can make the mini Flatbox controller at home or simply order it preassembled for maximal convenience.
The RAC-J800B, part of the J800 series, is an excellent all-button controller that is available in multiple variations.
Compact, thin, and lightweight, this is an all-keys controller by RetroArcadeCrafts that sports Cherry MX switches.
KeyCade offers a multitude of fightstick variations, including this interesting specimen, the BBL UVP arcade controller, that you can order with custom artwork.
This mini fightstick's joystick struggles to properly register diagonal motions, but luckily, it is likely upgradeable to Sanwa.
PXN rebrands a well known enclosure in the fightstick industry with interesting artwork that may pique your interest.
The PXN-0082 can be considered decent compared to its competition within the category of mini fightsticks.
Perhaps the star feature of the Qanba Carbon, which runs on the PC and more, is its clamps that are fortunately detachable.