From Marvel's Legends Series, it's Logan and Hawkeye from the X-Men lineup!
Old Man Logan comes with two sets of hands (one with claws retracted and one with them out for battle), interchangeable head, and baby Hulk. Old Man Hawkeye comes with interchangeable head, bow and arrows, and crossbow!
Logan, previously known as Wolverine, has superhuman senses, strength, speed, durability, reflexes and stamina along with regenerative healing factor; and adamantium-laced skeleton, which leads to awesome-looking retractable bone claws!
Hawkeye, notably from the Avengers, is a master archer and marksman, expert tactician, acrobat and hand-to-hand combatant!