Portfolio for a Technical Player

What openings:

- Can be easily tranposed to, and/or

- Require opponent to have specific move orders lest lose material, and/or

- Have a deep book-move theory (and suggestions of book with such moves?), and/or

- Do not tend to have many viable variations.

I'm not super booked-up on it myself, but I know the Ponziani opening for white is very easy to get in, presuming black plays 1....e5. A lot of the natural looking moves for black end up being incredibly bad, either losing material or giving a decisive advantage to white. It's a lot trickier than it first looks. Worth a shot in my opinion.

Hi manicles--this could be a long answer, but keep in mind that 1. d4 generally doesn't transpose to e-pawn openings because the king fails to support an e4 push.  So think of those as separate systems; with that being said, 1. c4 or 1. Nf3 can both easily transpose you into openings normally starting with d4.  Nothing actually forces the opponent to avoid losing material; if it did, it'd be the only opening anybody ever played.  You can get a strong attack with most gambits, but then you asked about something that doesn't have a lot of variations.  Avoiding the clearly unsound, what about a hybrid system like Nf3 combined with b3/f4?  Or with g3/d3, since the King's Indian Attack is flexible already.  There are also one-size-fits-all setups like the Colle/Torre/London, but those really don't tranpose you to much besides a relatively equal middlegame.  It's difficult to stop black from getting certain ideas in place regardless--for example, ...d5 supported by ...c6 or ...e6 like in a Slav/Caro/French, or ...c5 supported by ...d6/...e6 like in a KID, Benoni, etc. if that's really what your opponent wants.  I'd recommend some of the above ideas though, maybe starting with c4 or Nf3 since that whole English/King's Knight family is considered flexible and liable to trip up weak positional players.

Always been sceptical about london/colle/torre system. I basically consider myself to know Ruy Lopez and Sicilian Dragon better than most <1500 players, and to some extent, Scotch Game and Grand Prix Attack. I tried to get into the Grunfeld and the Slav Noteboom variations but just keep losing or making bad sacs haha.

Yeah will have to take a closer look at some of your suggestions. Thanks very much. 

I'm afraid there is no perfect repertoire for you. Two players play a chess game and both players are able to manipulate the type of game you get. Unfortunately for you it is alot easier to turn a game into a positional grind than a sharp complex mess(just look at what Carlsen did to Anand in their championship match). You can only hope your opponents are as willing as you to go into sharp positions and if they do that usually means they are good at those types of positions too.