A 4e monk can do it as well as many other 4e classes can... both might want to consider picking up Polearm Gamble if that's the thing they want to be doing.
With polearm gamble you do strike your foe before he closes with you.
Only because monk attacks usually don´t have powers with range weapon, it doesn´t mean that there could be a class which usually has powers that target AC, uses the proficiency bonus, have range: weapon (melee or ranged) but do a fixed amount of damage. (Which were available in the playtest monk IIRC but are too confusing in the current framework of the game)
2) you can´t use powers fo AoOs, irrelevant that it doesn´twork with your powers in this context

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.