^^
Problem 1. The PCs can't beat Telamont, he, along with other villains of significance are several orders of magnitude above the highest levels PCs would WANT to play, with custom toys to boot. Which is why hes being checked by the Chosen, no number of lesser adventurers thrown at him would provide more than a distraction.
So yes, you have a nuclear checkmate. The Chosen are busy suppressing the important villains, the PCs are taking on the sideshows, or else setting up a nutshot by one of the big guns.
That said, Salvatore isn't so bad(aside for the sin of inspiring Drizzt fanboys to make their legions of Dual Wielding Good Drow Rangers), powerful NPCs do not generally swoop in, while emo-boy there is a melee class using a sub par fighting style that doesn't work as written in the books(high mobility running fights with TWF at any rate, hes using BOTH spring attacks and TWF, along with using his SLAs apparently as a swift action).
He uses the strengths of the setting(high detail background scenery), and his own strengths(compelling close combat fight scenes), while entirely avoiding world spanning adventures(the setting's bane). Drizzt's conflicts are personal, whether internal(him being emo, his love life) or external(orcs want to kill him, so does Artemis Entreri, so do giants, so do drow). He battles massively under-CRed foes, and understandably goes through them like a hot knife through butter.
The weaknesses of the setting are mitigated, most spellcasters he personally knows are barely capable of crapping out a fireball, and Alustriel made a cameo appearance once(only to get shot down by a great deal of perfectly normal arrows(silly girl, use some goddamned protection spells)).
In short, hes like any good DM, straight out avoiding the setting's pitfalls and working to his own strengths.