I find that lamentation a bit funny, because the list in practice is never really complete. For instance, you forgot the mighty Prolog. Surely, tcl belongs on there too.
The more of them you explore, the more insight you get. The list does not have to be complete. It just needs to list some languages, that are truly different in how they work and what the ideas behind them are.
I blame the unknown unknowns. I don’t haven’t learned Prolog yet. Alas, enlightenment still eludes me.
(Agreed that TCL is pretty cool)
Also SNOBOL/Icon.