Assuming this wall is currently open, and will be closed up and inaccessible, here’s what I would recommend:
1. One good-quality HDMI. A few extra dollars today for an upgraded HDMI cable can save you hundreds later when you need the additional quality.
2. Two Cat5E or one Cat5E plus one Cat6. One of these is for a network connection (think connected TV) and the other is for control (think IR repeater or RF to IR system).
3. If possible, pull these through a preinstalled 2-inch cable conduit with a messenger line. This will enable you to pull additional cables if/as needed for future use.
4. If (3) isn’t possible, throw in either 3 Cat5E/Cat6 or a bundled MiniRGB (5-conductor) with 2 -3 Cat5Es. Since you don’t know what you’re going to want in the future (Quad-HD? 3D, super-duper-deep color? Audio?), you want as many options as possible to allow you to upgrade later.
Of course, if you remodel this room every 5 years or so, and don’t care about re-drywalling at that time, I’d stick with a single HDMI and 1-2 Cat5’s (depending on whether you need control, network, or both). No point in throwing in the kitchen sink if the next upgrade cycle is around the time you’ll be remodeling again anyway!