We will be arriving the day before Easter.
First, keep an eye on the park hours because in recent years it has been common for WDW to announce in February that they are expanding some of the hours for the week before and after Easter. Those 8 AM EMH at the MK may end up being 7 AM, with the regular park opening at 8 AM.
If the hours are expanded, and if you are willing and able to get there at 7 AM, you should be able to do all of the things you listed easily before 11 AM. Keep in mind that only the rides in Fantasyland and Tomorrowland are open during AM EMH. So, IASW and Philharmagic are the only things on the list that will be open during that first hour (and I'm not sure about Philharmagic).
We love those 7 AM EMH and when we use them we do some of the main attractions in Fantasyland and Tomorrowland (Space, Buzz, Peter Pan, and maybe a couple more) in that first hour. Then, when the rest of the park opens at 8 we will go (usually in this order) to Splash, BTMRR, POC, Jungle Cruise, and Haunted Mansion (getting there by using the breezeway "shortcut" from Adventureland to Frontierland). We have never had a problem doing all 5 of those attractions between 8 and 10 AM. If the park doesn't open until 9 (with EMH at 8) it might be tight doing all of those things before 11 AM, but it could still be doable. Needless to say, there are more people there in the first two hours when the regular opening is at 9 than when it's at 8, so the lines at the attractions will build up a little faster.
