>>151162114 (OP)
Tamaraneans are not as physically tough as Kryptonians. They are stronger than normal like a 10ton type of lifter, and can fly in space as well as survive in space. Starfire was stronger than Cyborg but less than Wonder Girl, sometimes matching Aqualad. Don't think I have ever seen one be bulletproof though.
Thanagaraians without Nth metal are like slightly enhanced humans. They live like 200-300 years, have Wolverine style senses of smell and hearing, and are just a tad tougher than a typical human. With Nth metal they heal superfast, can also survive in space, and can negate gravity on things they lift so it looks like superstrength.
Daxamites are basically Kryptonians if bullets were their weakness.
Next best contender are Czarneans who are about as strong as Kryptonians and they heal from anything no matter what.