I want to order a few tomato seeds pepper seed
Black krimm and black cherry
Who are a couple that you suggest
Baker Creek at rareseeds.com
I cannot recommend any from growing large volumes of vegetables, but I can say from germination rate over time (even long periods of time), my favorite is Victory Seeds. And they note where the seed originates on most of the special varieties such as those you listed.
Baker Creek (a.k.a. Rare Seeds
Hopefully, someone has grown those you mention and can make a suggestion.
I've ordered from a number of seed companies, Most have done well for me. But my favorite is Sandhill Preservation Center. Once they have a variety they try never to drop it, even if it doesn't sell well.
My favorite seed companies that carry both Black Cherry and Black Krim already have been mentioned, so I'll just add this--both those varieties are slightly lower in price at Victory Seeds than at Baker Creek, although the difference is only 25 cents per packet. Both those companies have fast shipping, but the sooner you order the seeds at this point, the better. This close to planting season, all the seed companies tend to get backlogged and orders are slower to ship.