15 button controllers can be considered the bare minimum to play a certain modern fighting game while pulling off all its mechanics smoothly.
The LVL is a leverless controller with a hot swappable PCB as well as a built-in slot for an adapter to enhance compatibility options.
The K10's unmatched Crown buttons coupled with Cherry MX Speed Silver switches make it a formidable controller in any tournament.
P-3 Controller offers you cases like the Lotus Lever and Lotus Clear—the latter of which is a leverless case.
It seems that DOIO took its creative liberties with the spacing of the KBGM-H03's buttons, especially the uppermost button.
The VM6R offers multiple layouts and can be ordered as a case or preassembled. It also features both Iris and Lolli tech.
Chibico by Acrycade Gear is a mini stickless controller that should be able to fit into a back pocket of a pair of pants.
The DRMFTG DRM FL packs a lot of innovation, including many layouts, if you are willing to primarily use it on a desk.
No, your eyes aren't playing any tricks on you! The Yamacon indeed has elevated hand rests in an attempt to be the most ergonomic controller.