Even Litecoin officially supports privacy these days via Mimblewimble / MWEB, although the privacy is not as strong as Monero. Litecoin is easier to work with since all crypto exchanges support it unlike with Monero. I would like to see Bitcoin similarly support Mimblewimble / MWEB.

Bitcoin Lightning also has privacy, although it's not as strong as MWEB and obviously nowhere near Monero.