PQ2 or Laura Bow 1, both struggle with the parser interface IMO, and all the rest actually do quite well with it. PQ2 needs updates beyond the parser change, though.
Iceman would be the next, but only if it had gameplay changes and tweaks on top of the P/C interface.
Larry 3, SQ3 and Camelot are all perfect as is. I would just want more music in SQ3, and marginally more in Camelot- and have no artists in mind who would be worthy of doing it, MusicallyInspired would be the only one in the frame.
As for Les Manley, the first game is quite good. It would need changes beyond just parser->P/C to properly update it, like changing some idiotic game designs (see: dead ends and excessive walking) which crop up once or twice.
When I say changes beyond, I mean if all you do is remove parser and make it P/C, you have made the game only slightly more accessible but not really addressed the issues that make it a hard game to play in 2018/9. Take Iceman for example, it has the makings of an amazing game, but the sub sequence, some other sequences and some insanely hard puzzles make for a game not many want to revisit. Simply changing the interface would make it slightly easier to look at things and use inventory items, but doesn't stop the bad game design from being a major barrier. You would need at least a 'lite remake' to make it playable in a real sense.
I don't see many advantages of a 'remake' which only removes parser. Usually, the switch from parser to P/C is cited as a negative by adventure game fans! (For me, and probably I am one of the few who thinks the following, Colonel's Bequest and PQ2 were horribly made games in terms of playing them, and have lots of conversation trees which most players won't ever see all of. P/C would go a long way to helping with that, even though it doesn't solve CB's timing/Act issues and PQ2's occasionally obtuse, annoyingly optional and hard to fathom puzzles.)
To end on a positive, I think Larry 3, SQ3 and Camelot are actually the best 3 EGA Sierra games ever made. Probably 3 of the best EGA games ever made total.