If this is for presentation use, from an audience that just needs to see basics of charts and other such things, then almost any reasonable rear projection surface would be just fine. A big player is the projector which will be used and the screen size. Short throw projectors are traditionally not very bright and most commercial environments have VERY poor light control. This means that there is typical florescent lighting within a room and at least 80 advertised lumens are the absolute minimum projector requirement per square foot of screen space. A projector with either 1920x1080 or 1920x1200 resolution is all that is needed. 4K resolution with a connection to any computer running at 100% resolution produces text and details which the audience wouldn't be able to read, so it's a waste of money to spend more on resolution.
It is almost never a waste of money to spend more on brightness.
The slight desharpening of rear projection will be irrelevant in such a use case as what you have.
Throw distance will matter a great deal. The projector will matter a great deal. It's fine to say it is more convenient to use rear projection, but you need the space behind the screen to place the projector, which could be very problematic. The solution is not throwing the term 'ultra short throw' (UST) at it, because UST requires a VERY flat surface and with rear projection, it needs extremely high diffusion for an even image. Those are two big factors that work against it. As well, UST is much more difficult to setup properly than standard throw. Even the brighter and more typical short throw models need a really flat screen surface for proper results.
I would come up with some goals. Some very loose desires, and then see what budget you will need to deliver those results. Start with a desired screen size and work out the square footage, multiply by 80 and that will be your minimum lumen requirement, then throw out a throw distance to achieve that screen size and see if there are any models which will do what you want and are bright enough.
For example. Let's say you want a 140" diagonal 16:9 screen.
122" wide x 69" tall = 8,418 square inches or about 58.5 square feet. So, 4,680 lumens minimum requirement. Or, about a 5,000 lumen projector for acceptable results.
I would ideally use a model like this:
https://www.projectorcentral.com/Panasonic-PT-VMZ50U.htm
It can throw that 140" diagonal from as close as 11'1" or as far as 18' from lens to screen and is reasonably priced. No lamps to replace which increases reliability and should provide a more consistently bright image during use.
Find screen size and throw distance for the Panasonic PT-VMZ50U projector.
www.projectorcentral.com
What if you want shorter throw? Well, you still need that brightness, so your list looks something like this:
Things get expensive, and almost every projector needs a specialty add-on lens which will cost several thousand dollars.
While a model like this may jump out as an option...
https://www.projectorcentral.com/Optoma-ZU500USTe.htm
Understand that by the specs, it is only rated to support a screen size of up to 120" diagonal. This won't actually work on a 140" screen with proper focus.
You would need to go to something like this for an all in one UST solution which can handle that 140" screen size...
BenQ LU960UST projector specs, projector reviews and current street prices.
www.projectorcentral.com
So, yeah, this is why your original question is very complicated, because you need to nail all the fine points of what you want before you can really get into "What kind of screen should I get?" type of questions. I would then actually buy the projector, and probably get some screen samples to try to figure out which I liked the most with the specific projector which was purchased.
