I am particularly interested in support for the following remotes as they seem to be the cheapest minimalist remotes:
Were you particularly interested in wireless, as opposed to the more usual IR ?
The PI has HDMI-CEC capabilities. The remotes you picked are very basic. Your own tv remote could do those same functions.
None of those remotes are officially supported.
MCE remotes should work.
A list of IR remotes are available under My OSMC -> Remotes, although this is not an exhaustive list.
FLIRC will also work, but a GPIO IR TSOP is cheaper and will work just fine with a little bit of setup.
There is an official controller here: OSMC Remote Control - OSMC.