Controllers that have LED support usually have lights that can shine around their buttons or through their sides as well.
What more can you ask for? The KBGM-H09 has a whopping 17 buttons and is suitable for both desk & lap play!
The LBER 2040-L16 looks and plays like an Haute42 controller but may have just the right amount of nuance for you to prefer its style.
Despite its small size, the Kylinix L14 manages to fit in 14 buttons, three USB ports, and more goodies that may appeal to you.
The Kylinix K15 is a spacious yet light & slim controller with more buttons than usual, and the buttons can even glow.
Just when you thought 16 buttons are a lot for a leverless controller, GuileKeys released the GK-21, which has 21 buttons!
The Mytrix M16 is one of those thin stickless controllers that have 16 buttons laid out in a way that also gives you access to a WASD layout.
The Haute42 S16-C is like the previous S16 but on steroids: it comes preinstalled with the fast Crystal switches!
The Haute42 U16 is a large leverless controller with plexiglass on top as well as an injection molded bottom.