Surprised no one mentioned this: just play the usual texas holdem and randomly introduce a hand of dealer's choice.
For example, we play holdem, but when the ace of spade appear on the board, the very next hand is dealer's choice. Pretty sure I saw it on twoplustwo a long time ago so it's not an original idea.
My original intent was to discourage the holdem-only players from coming to my game. Those people usually don't give action and are too risk adverse to play games they didn't study strategically.
A lot of home games I go to also have a similar idea with a different dealer's choice trigger (black aces, one-eyed jack, monotone flop, trips on the flop, etc).
Start with games that are similar to holdem: pineapple, all the other pineapple variants, hollywood, super holdem; then introduce the concept of Omaha with PLO, SOHE, PLO6, etc.
Eventually, you'll convert or discover enough players who prefer to play non-holdem games.