Champion #1: non-royal King, also colloquially called "Man", or in CEO terms "SuperDummy". There's been quite a lot of talk about how much having this moveset is worth recently, so this should be the easiest one. Currently all the Man-or-better Champions are valued at 6 or more. Nerfing them requires costing them at 7; therefore the Man by itself is probably worth a bit more than 6. 6 1/2 is probably about right; it might be a touch less, but I'm not bothering with that level of granularity for this mental exercise.

Champions #2 and #3 are more or less the same, so I'll judge them simultaneously. First: Apprentice+++ sits at 9 points and is strictly better than either of these pieces, so they should be valued at less than 9 (assuming Apprentice+++ is correctly priced, that is, but with Wizard sitting at 13 it's gotta be in the ballpark).
Champion #3 could be loosely analogous to Knight+, with a short-range move option and some 2-range jumping attacks, although Knight+ can jump without attacking, so #3 must be worth less - probably by 2 whole points' worth, actually, which would set its cost as 6. Then Champion #2 would be worth something like 5.5 - the transition from normal attack-only to jumping attack-only isn't that strong on a piece like this.

Also, for reference: You have my word that I did not cheat by peeking at the comments prior to writing this.