You are posting in a privacy community confessing that you were long hooked on some keyboard for their shiny look and what not :-) What do you really want from a keyboard app besides privacy ?

• Funky characters ? f-droid.org/en/packages/mf.asciitext.lite/

• As simple as possible ? f-droid.org/en/…/rkr.simplekeyboard.inputmethod/

Probably there is more privacy friendly ones in this long list : search.f-droid.org/?q=keyboard&lang=en

Have fun!