Wifi is not ideal for home automation for many reasons, including power consumption, wifi congestion, and cloud dependence. But others can wax eloquently on that subject. There are a number of wifi devices that HE does support, usually ones with local (not cloud-dependent) integration.
Hue is the sort of gold standard for color light bulbs though many folks have had good luck with other brands. LIFX is also popular and that is an wifi integration but without a cloud dependency. For dimmers and fan controllers I use Lutron Caseta but there are lots of zwave and zigbee options. For thermostats I use ecobee (wifi integration that is cloud dependent) but there are lots of options in that space, as well. Honeywell makes a zwave thermostat that is very popular.
The "official" supported devices list just represents things HE has actually tested and are known to work. But many, many other zigbee and zwave devices will work just fine, especially if (unlike Aqara and some others) they actually conform to the zwave or zigbee standard. I usually do a search on these forums and see if anyone else is using them and what experiences they have. You'll also find many devices that work with community-supported drivers. I've had good luck with many of them.
