You have an odd definition of skillshot, especially because this comes out of comparison with LOL; in that point of reference, anything ground targeted (that isn't a constant aoe like sniper's shrapnel, though I think you could even argue for those, or instant on a point) is a skillshot because anything ground targeted can be cast to hit enemies in fog of war or that are invis.
Also you missed Kunkka's Torrent and Ship (which is probably the hardest "skillshot" in the game) Shadow Demon's poison, DP swarm, Spectre dagger, Dragon Knight flame breath, Magnus's skewer (which is a lot harder to hit than shockwave), VS howl, Pugna blast, Morphling wave, Furion trees, Lina dragon slave, everything on phoenix, WD malefice, windrunner powershot, weaver swarm.
I would also argue for positioning based skills like Mirana's Leap, and Templar Asassin's blades. (you already have Razes and Slark pounce)
I also looked on the league wiki out of curiosity and they list something called "proximity self-targeting" under skillshots which means pretty much any aoe targeted around yourself that is non-constant;
Stuns: Centaur, Slardar, Tide, Magnus, Earthshaker, Clockwerk, Axe, Visage Familiars. Non-stunning damage spells: Tinker missles, Skywrath concussive shot, Gyro barrage, leshrac edict, tide anchor, bristleback quills, naga riptide, Meepo Poof, Brew slam, Spirit breaker charge, shadow fiend ult, QOP scream, Necro pulse, CM ult, troll axes, Puck silence, ursa shock, everything timbersaw.
No damage spells: Omni ult, Naga sleep
Lastly, I would argue anything targeted with an aoe component at the end of its targeted range should count as well, so sven, alch, disruptor, witch doctor, Lich ult, treant seed, and omni heal.