I hate to say this but your solution may be a combination of three of your variables. Color boards are your friend when trying to solve these multi variable problems.
First, observe how the different lighting affects your current tables. In the shop, in front of a window, under low ceiling fluro, in a darkly lite room.
MLC wiping stains are excellent. Unfortunately, they may be too good. They can highlight David's curly maple example. Not even it out. Another brand or type of stain may even out the grain.
Using a toner coat will definitely help to hide the wood if you add enough pigment. However, we typically use toner coats to slowly change the color without losing the wood grain.
One of the most extreme examples of heavy toner coats would be the classic cherry wood. Maple is painted with a very high colorant toner coat to not resemble cherry in any way shape or form.
The sheen you are using could be the biggest help. MLC makes gloss, satin, dull, flat. Simply switching to a dull may help you.
We are a small shop. I would make up a bunch of special color boards. 3/4" ply each made of two pieces edge fastened together. Maybe 8" x 8" or 12" x 12" edge glued together. This will simulate your 90 degree table turning problem.
This is science. You need a pile of boards. Mark what you do to each board on the back. Not the front. This will eliminate bias. Also get other people to look at them. You've got 3 variables to mix and match.
Don't worry about which wood you could potentially use. Try to solve the current problem with the finishes.