My 50-lb aluminum electric bike is the only one that requires a specially-cushy saddle, but I don't like or nor need the cushiest kinds. I have used the Serfas Performance Rx on this bike since new and it's suited me fine. Unfortunately, it's currently $72 at Amazon in the US. I paid $70 in 2013. I for sure have seen it for at least $65 in the interim -still not cheap, but not as ridiculously-priced as many others. There are other/non-"Performance" Rx models that sell for less, but I've never used any of them. Good like on finding a comfortable option that fits and suits you well.
N.B.: I stopped riding on "hard tires" years ago, and skinny ones, even on my road bike. Also, I'm continuously checking myself that I'm always riding on my seat bones.