I actually did research on this a little while ago when needing a HDMI switch in November.
I would highly recommend this one:
https://www.amazon.ca/gp/product/B00UM3AA6O/
I have all of my gaming consoles (ps4, wii u, ps tv & ps3) and computer hooked up to it and the auto-switch works flawlessly (never needed to use the included remote once).
If you buy a cheapy hdmi switch that DOESN'T require power there's a good chance you'll run into issues with auto switching (apparently the ps4 has problems with this), so I'd stay away from those and just invest in a $20 that you'll never have to worry about.
If 5 ports is too many for you they also have a 3 port version:
https://www.amazon.ca/dp/B00V7DUIA6/