I came here to mention these Bontrager tires because I figured they’d also be overlooked by most. My race tire is the GP 5K or the Specialized Turbo RapidAirs.
But, if you’re looking for something that’s similar to the Conti 4 Seasons then the Bontrager R3 Hardcase Lite TLR is a great tire. It’s what I use as a winter / training tire. It’s also a nice enough tire that I don’t feel like I need to swap it for any early season racing.