Tips and tricks for a better looking taskbar
Background from the recordings are from TylerCreatesWorlds on DeviantArt.
Aero Peek Button
TranslucentTB has an option to hide it, resulting in a better appearance when on the desktop. It also offers a dynamic option, which allows to hide it only when there is no maximised window.
TranslucentTB’s color picker offers live preview, so you can try a bunch of color options easily.
If the taskbar elements show up with a different coloring, make sure to turn off the accent color on the taskbar, under “Settings” > “Personalization” > “Colors”.
Timeline, Task View, Cortana, Search and other buttons
You can hide them by right-clicking on the taskbar and then unchecking the appropriate option.
Action Center, IME, volume, battery and other system icons
You can hide them by going into “Settings” > “Personalization” > “Taskbar” > “Turn system icons on or off”.