Welcome to the Forum!! You don't say if you have overhead lighting and or a heat pad underneath. Been in your position every year, LOL. I would let the seedlings go a little longer as is, covered, regardless of the tall ones, remembering that one should not transplant any seedlings until there are more leaves on the stem/stalk, than just the top leaves it opened with. Keep your eyes on the tall ones, but I think they will be fine. They will just bend over and "go with the flow" while the yet-to-emerge seeds, will truck on. Note: When you do transplant seedlings, they will need overhead lighting, or they will get very spindly. Cheers!