Since Pence has declined to invoke the 25th the only option left is impeachment unless Trump resigns to avoid being impeached.
The article of impeachment cites “Incitement of Insurrection” providing the option to invoke the 14th should the senate not vote for removal which allows Trump to be prosecuted for Insurrection under the 14th.
Either impeachment or the 14th will prevent Trump from holding office. The 14th is easier than impeachment as it only takes a majority not a super majority (2/3rds) and wouldn’t take up Senate time for a trial. It does however involve the courts after Congress votes for it.
Four Republicans (Katko, Cheney, Kinzinger, Upton) currently support impeachment, and McConnell is considering support as he does not see it as partisan and wants to see the evidence.
It is hard to understand why Pence won’t invoke the 25th which the House passed today (1-12-21) when he had to be evacuated with his wife, daughter and brother because mobs wanted to hang him and Trump didn’t care enough about his well being to even check on his safety.