There's a reason the big boys have ditched suspensions. Trek, Specialized, Stromer. I put a rigid Salsa fork on my CCS. Made the bike way more agile and a 2.4" tire absorbs the bumps. Try it.
E-bikes are so heavy, even a 4" tire pumped to psi's allowing for reasonably low rolling resistance won't reduce shock from bad roads to any appreciable degree. I've ridden e-bikes with 2" to 4" wide tires, and ebikes are always far more uncomfortable and transmit much more shock than a standard 20 to 30 lbs. bicycle with far narrower rubber.
As far as bicycle design, the size of a company doesn't ensure quality design. In fact, it can often ensure the opposite. Trek used to design some really nice bikes in the late 80's and 90's. Even into the 2000's, they still managed to produce some nice designs due in large part to Gary Fisher's input.
The company is so large now and cover so many different product lines, there is not a single model (bicycle, component or accessory) which is even remotely close to being the best or among the best. The trek powerfly for instance is probably my least favorite emtb I've ever ridden, and I've demo'ed at least 15 models if not more.
Their isospeed road bikes are just laughably overpriced and the tech is so bad it's silly. Redshift offers a superior suspension stem and seat post for a grand total of just $400 combined, yet their products surpass the performance of trek's isospeed which starts at $4K: 10x the price for inferior tech.
I have a lot more respect for Specialized but again product quality varies immensely. Their road bike geometry ime is among the best in the industry. They just get it right. From what I've read, their stumpjumper geometry has improved dramatically in the past year or two. However, as recently as 2015/16, the stump jumpers were notorious for suspension bob. There are lots of bikes with this problem, but they don't charge anywhere near the premium that specialized does. You can purchase a YT or GT or Fezzari with identical spec for thousands of dollars less.
Stromer of course is notorious for their lack of reliability and rock bottom customer service, easily the worst in the industry according to reports here. Not to mention, they aren't even a "big" company so they don't fit this definition at all.
I've been test riding and demoing Trek bikes on and off since 2009, and have owned multiple trek and Gary fisher road and mtb's since 1989, but I've been disappointed almost every time I've ridden a trek in the past 10 years.
Stromer isn't even a big company, and they put absolutely zero thought into frame geometry. Trek and Specialized design quality is spotty. Specialized has made some really nice road bikes recently (past 5 seasons or so) that I can vouch for, but their mtb's not so much. Trek has been pretty much a train wreck in design in most every product line for at least a decade, riding on the coat tails of their own brand prestige for at least that long. But Lance has long been disgraced and every other company has caught up to OCLV tech and surpassed it.
Bottom line is that none of the companies mentioned are industry leaders in design or performance. Not even close.
Their eschewing of suspension is simply a cost cutting measure that at least Trek and Specialized can afford to get away with because of the size of their companies.
On the mtb side, the best bikes are being designed by smaller boutique brands such as ibis, yeti, spot, and a few others. In terms of value, specialized and trek are getting trounced by direct to consumer companies such as yt, fezzari, spot, and many others.
2" tires supporting a 70 lbs e-bike isn't going to offer any meaningful shock absorption.
