Speaker set up for more than 1 person

They have been here.  ATC specifically has designed for wide dispersion as this is critical in larger studio control rooms where mutiple people are working on the recording (scoring recording) or you have a large console that has a lot of channels (for orchestra or a large production).  In these cases you cannot have only one person hear the image, you’ll not build the right mix as it's a group effort.  

Nearfield evolved in studios to enable an engineer to sit close to the speakers and reduce the ratio between reflections and direct sound.   Basic near field is two speaker set up in a very small triangle with the listener very close- maybe even a few feet apart.  This is done to enable a mixer to work in different rooms and get a similar result as you reduce the rooms influence [note room influence cannot be completely eliminated only reduced or exaggerated].  This is what made studio near field speakers like Auratones or NS10 popular as they are so small.   The near field technique works only when it's one person and he or she can sit close and reduce the triangle between left/right and listener.  

So to build a larger sweet spot you need very wide dispersion speakers with excellent off axis response and enough SPL capability to fill the larger space (since you still need to be far away from walls to reduce reflections, reducing reflected to direct sound ratio).  So larger sweet spots also require special speakers, special set ups and larger spaces.  Toe in reduces image size every time but some speakers need this as they are narrow dispersion (like horns) and you never get them to "meet" at your location unless you do significant toe in (depending on how far you sit from them).  It’s extremely difficult in small spaces to find the right compromise especially since manufacturers really don’t share their off axis response with you so you may own narrow dispersion speaker and not know it.  

Narrow dispersion can sometimes be appealing in practice as with narrow HF, it reduces the first reflections (from side walls) in the room and can improve the image.  The owners can think their speakers image better when they actually image worse BUT the tiny sweet spot works better in that specific space.

Most commercial speakers are not meant to be pointed directly at one's head, so they do sound better with little or no toe in for a wide variety of listening positions.

Generally there are 2 schools of thought. One, to use more directional speakers pointed into the room.  This way as you get closer to one side you hear it less.  I understand the theory but have never heard it used successfully.

The other approach is to make speakers with wide and even dispersion, and point them forward instead of in.   I personally have heard this and like it.  Magico and Revel are excellent examples of speakers that give a wide sweet spot with little toe-in.

One could get a pair of Ohms. They have a very big sweet spot.

That is what Ohm Walsh uniquely do best in most any room. 

+ on the Ohm's, I use Duevel Planets which do basically the same thing as Ohm's in a far more attractive package.  I used to own Ohm Walsh 3's and they converted me to omni's from here on out, regular speakers to me just sound wrong.